Finding the Third Proportional to 387,432 and 581,125.50

Step by Step Solution

1. Step 1: Write the proportion equation
   387,432 : 581,125.50 = 581,125.50 : x
2. Step 2: Convert to fraction form
   387,432/581,125.50 = 581,125.50/x
3. Step 3: Cross multiply
   387,432x = 581,125.50 × 581,125.50
4. Step 4: Simplify right side
   387,432x = 337,706,846,750.25
5. Step 5: Solve for x
   x = 337,706,846,750.25/387,432
6. Step 6: Final answer
   x = 871,654.50