Finding the Third Proportional to 504,172 and 781,045.50

Step by Step Solution

1. Step 1: Write the proportion equation
   504,172 : 781,045.50 = 781,045.50 : x
2. Step 2: Convert to fraction form
   504,172/781,045.50 = 781,045.50/x
3. Step 3: Cross multiply
   504,172x = 781,045.50 × 781,045.50
4. Step 4: Simplify right side
   504,172x = 610,032,073,070.25
5. Step 5: Solve for x
   x = 610,032,073,070.25/504,172
6. Step 6: Final answer
   x = 1,209,968.17