Finding the Third Proportional to 399,969 and 562,531.50

Step by Step Solution

1. Step 1: Write the proportion equation
   399,969 : 562,531.50 = 562,531.50 : x
2. Step 2: Convert to fraction form
   399,969/562,531.50 = 562,531.50/x
3. Step 3: Cross multiply
   399,969x = 562,531.50 × 562,531.50
4. Step 4: Simplify right side
   399,969x = 316,441,688,492.25
5. Step 5: Solve for x
   x = 316,441,688,492.25/399,969
6. Step 6: Final answer
   x = 791,165.54