Finding the Fourth Proportional to 802,978.98, 1,108,142.05 and 440,418.12

Step by Step Solution

1. Step 1: Write the proportion equation
   802,978.98 : 1,108,142.05 = 440,418.12 : x
2. Step 2: Convert to fraction form
   802,978.98/1,108,142.05 = 440,418.12/x
3. Step 3: Cross multiply
   802,978.98x = 1,108,142.05 × 440,418.12
4. Step 4: Simplify right side
   802,978.98x = 488,045,838,353.95
5. Step 5: Solve for x
   x = 488,045,838,353.95/802,978.98
6. Step 6: Final answer
   x = 607,794.04