Finding the Third Proportional to 86,739,429 and 189,300,990

Step by Step Solution

1. Step 1: Write the proportion equation
   86,739,429 : 189,300,990 = 189,300,990 : x
2. Step 2: Convert to fraction form
   86,739,429/189,300,990 = 189,300,990/x
3. Step 3: Cross multiply
   86,739,429x = 189,300,990 × 189,300,990
4. Step 4: Simplify right side
   86,739,429x = 35,834,864,814,980,100
5. Step 5: Solve for x
   x = 35,834,864,814,980,100/86,739,429
6. Step 6: Final answer
   x = 413,132,357.78