Finding the Fourth Proportional to 78,372.72, 108,151.28 and 42,561.92

Step by Step Solution

1. Step 1: Write the proportion equation
   78,372.72 : 108,151.28 = 42,561.92 : x
2. Step 2: Convert to fraction form
   78,372.72/108,151.28 = 42,561.92/x
3. Step 3: Cross multiply
   78,372.72x = 108,151.28 × 42,561.92
4. Step 4: Simplify right side
   78,372.72x = 4,603,126,127.26
5. Step 5: Solve for x
   x = 4,603,126,127.26/78,372.72
6. Step 6: Final answer
   x = 58,733.78