Finding the Third Proportional to 392,423 and 591,510.50

Step by Step Solution

1. Step 1: Write the proportion equation
   392,423 : 591,510.50 = 591,510.50 : x
2. Step 2: Convert to fraction form
   392,423/591,510.50 = 591,510.50/x
3. Step 3: Cross multiply
   392,423x = 591,510.50 × 591,510.50
4. Step 4: Simplify right side
   392,423x = 349,884,671,610.25
5. Step 5: Solve for x
   x = 349,884,671,610.25/392,423
6. Step 6: Final answer
   x = 891,600.83