Finding the Fourth Proportional to 860,499.76, 1,187,349.96 and 478,516.72

Step by Step Solution

1. Step 1: Write the proportion equation
   860,499.76 : 1,187,349.96 = 478,516.72 : x
2. Step 2: Convert to fraction form
   860,499.76/1,187,349.96 = 478,516.72/x
3. Step 3: Cross multiply
   860,499.76x = 1,187,349.96 × 478,516.72
4. Step 4: Simplify right side
   860,499.76x = 568,166,808,351.33
5. Step 5: Solve for x
   x = 568,166,808,351.33/860,499.76
6. Step 6: Final answer
   x = 660,275.38