Finding the Third Proportional to 87,631.50 and 189,060

Step by Step Solution

1. Step 1: Write the proportion equation
   87,631.50 : 189,060 = 189,060 : x
2. Step 2: Convert to fraction form
   87,631.50/189,060 = 189,060/x
3. Step 3: Cross multiply
   87,631.50x = 189,060 × 189,060
4. Step 4: Simplify right side
   87,631.50x = 35,743,683,600
5. Step 5: Solve for x
   x = 35,743,683,600/87,631.50
6. Step 6: Final answer
   x = 407,886.25