Finding the Fourth Proportional to 78,326.72, 108,087.76 and 42,515.52

Step by Step Solution

1. Step 1: Write the proportion equation
   78,326.72 : 108,087.76 = 42,515.52 : x
2. Step 2: Convert to fraction form
   78,326.72/108,087.76 = 42,515.52/x
3. Step 3: Cross multiply
   78,326.72x = 108,087.76 × 42,515.52
4. Step 4: Simplify right side
   78,326.72x = 4,595,407,322.04
5. Step 5: Solve for x
   x = 4,595,407,322.04/78,326.72
6. Step 6: Final answer
   x = 58,669.73