Finding the Fourth Proportional to 860,321.32, 1,185,491.89 and 665,545.69

Step by Step Solution

1. Step 1: Write the proportion equation
   860,321.32 : 1,185,491.89 = 665,545.69 : x
2. Step 2: Convert to fraction form
   860,321.32/1,185,491.89 = 665,545.69/x
3. Step 3: Cross multiply
   860,321.32x = 1,185,491.89 × 665,545.69
4. Step 4: Simplify right side
   860,321.32x = 788,999,015,436.71
5. Step 5: Solve for x
   x = 788,999,015,436.71/860,321.32
6. Step 6: Final answer
   x = 917,098.06