Finding the Fourth Proportional to 78,892.80, 118,425.60 and 43,900.80

Step by Step Solution

1. Step 1: Write the proportion equation
   78,892.80 : 118,425.60 = 43,900.80 : x
2. Step 2: Convert to fraction form
   78,892.80/118,425.60 = 43,900.80/x
3. Step 3: Cross multiply
   78,892.80x = 118,425.60 × 43,900.80
4. Step 4: Simplify right side
   78,892.80x = 5,198,978,580.48
5. Step 5: Solve for x
   x = 5,198,978,580.48/78,892.80
6. Step 6: Final answer
   x = 65,899.28