Finding the Third Proportional to 87,219,142,248 and 189,323,780,638

Step by Step Solution

1. Step 1: Write the proportion equation
   87,219,142,248 : 189,323,780,638 = 189,323,780,638 : x
2. Step 2: Convert to fraction form
   87,219,142,248/189,323,780,638 = 189,323,780,638/x
3. Step 3: Cross multiply
   87,219,142,248x = 189,323,780,638 × 189,323,780,638
4. Step 4: Simplify right side
   87,219,142,248x = 35,843,493,915,065,541,722,112
5. Step 5: Solve for x
   x = 35,843,493,915,065,541,722,112/87,219,142,248
6. Step 6: Final answer
   x = 410,959,027,929.30