Finding the Fourth Proportional to 78,557.72, 108,409.86 and 42,747.72

Step by Step Solution

1. Step 1: Write the proportion equation
   78,557.72 : 108,409.86 = 42,747.72 : x
2. Step 2: Convert to fraction form
   78,557.72/108,409.86 = 42,747.72/x
3. Step 3: Cross multiply
   78,557.72x = 108,409.86 × 42,747.72
4. Step 4: Simplify right side
   78,557.72x = 4,634,274,340.52
5. Step 5: Solve for x
   x = 4,634,274,340.52/78,557.72
6. Step 6: Final answer
   x = 58,991.97