Finding the Third Proportional to 252,084.50 and 390,520.50

Step by Step Solution

1. Step 1: Write the proportion equation
   252,084.50 : 390,520.50 = 390,520.50 : x
2. Step 2: Convert to fraction form
   252,084.50/390,520.50 = 390,520.50/x
3. Step 3: Cross multiply
   252,084.50x = 390,520.50 × 390,520.50
4. Step 4: Simplify right side
   252,084.50x = 152,506,260,920.25
5. Step 5: Solve for x
   x = 152,506,260,920.25/252,084.50
6. Step 6: Final answer
   x = 604,980.71