Finding the Fourth Proportional to 78,978.13, 108,989.61 and 43,168.39

Step by Step Solution

1. Step 1: Write the proportion equation
   78,978.13 : 108,989.61 = 43,168.39 : x
2. Step 2: Convert to fraction form
   78,978.13/108,989.61 = 43,168.39/x
3. Step 3: Cross multiply
   78,978.13x = 108,989.61 × 43,168.39
4. Step 4: Simplify right side
   78,978.13x = 4,704,905,990.43
5. Step 5: Solve for x
   x = 4,704,905,990.43/78,978.13
6. Step 6: Final answer
   x = 59,572.26