Finding the Third Proportional to 535,815 and 729,688.50

Step by Step Solution

1. Step 1: Write the proportion equation
   535,815 : 729,688.50 = 729,688.50 : x
2. Step 2: Convert to fraction form
   535,815/729,688.50 = 729,688.50/x
3. Step 3: Cross multiply
   535,815x = 729,688.50 × 729,688.50
4. Step 4: Simplify right side
   535,815x = 532,445,307,032.25
5. Step 5: Solve for x
   x = 532,445,307,032.25/535,815
6. Step 6: Final answer
   x = 993,711.09