Finding the Fourth Proportional to 860,359.23, 1,187,288.37 and 478,382.67

Step by Step Solution

1. Step 1: Write the proportion equation
   860,359.23 : 1,187,288.37 = 478,382.67 : x
2. Step 2: Convert to fraction form
   860,359.23/1,187,288.37 = 478,382.67/x
3. Step 3: Cross multiply
   860,359.23x = 1,187,288.37 × 478,382.67
4. Step 4: Simplify right side
   860,359.23x = 567,978,180,500.55
5. Step 5: Solve for x
   x = 567,978,180,500.55/860,359.23
6. Step 6: Final answer
   x = 660,163.99