Finding the Fourth Proportional to 860,978.16, 1,188,149.85 and 479,004.84

Step by Step Solution

1. Step 1: Write the proportion equation
   860,978.16 : 1,188,149.85 = 479,004.84 : x
2. Step 2: Convert to fraction form
   860,978.16/1,188,149.85 = 479,004.84/x
3. Step 3: Cross multiply
   860,978.16x = 1,188,149.85 × 479,004.84
4. Step 4: Simplify right side
   860,978.16x = 569,129,528,795.27
5. Step 5: Solve for x
   x = 569,129,528,795.27/860,978.16
6. Step 6: Final answer
   x = 661,026.67