Finding the Fourth Proportional to 78,507.28, 117,796.56 and 71,862.88

Step by Step Solution

1. Step 1: Write the proportion equation
   78,507.28 : 117,796.56 = 71,862.88 : x
2. Step 2: Convert to fraction form
   78,507.28/117,796.56 = 71,862.88/x
3. Step 3: Cross multiply
   78,507.28x = 117,796.56 × 71,862.88
4. Step 4: Simplify right side
   78,507.28x = 8,465,200,055.69
5. Step 5: Solve for x
   x = 8,465,200,055.69/78,507.28
6. Step 6: Final answer
   x = 107,826.94