Finding the Third Proportional to 559,411.31 and 860,355

Step by Step Solution

1. Step 1: Write the proportion equation
   559,411.31 : 860,355 = 860,355 : x
2. Step 2: Convert to fraction form
   559,411.31/860,355 = 860,355/x
3. Step 3: Cross multiply
   559,411.31x = 860,355 × 860,355
4. Step 4: Simplify right side
   559,411.31x = 740,210,726,025
5. Step 5: Solve for x
   x = 740,210,726,025/559,411.31
6. Step 6: Final answer
   x = 1,323,195.85