Finding the Fourth Proportional to 56,111.60, 77,433.92 and 30,961.08

Step by Step Solution

1. Step 1: Write the proportion equation
   56,111.60 : 77,433.92 = 30,961.08 : x
2. Step 2: Convert to fraction form
   56,111.60/77,433.92 = 30,961.08/x
3. Step 3: Cross multiply
   56,111.60x = 77,433.92 × 30,961.08
4. Step 4: Simplify right side
   56,111.60x = 2,397,437,791.83
5. Step 5: Solve for x
   x = 2,397,437,791.83/56,111.60
6. Step 6: Final answer
   x = 42,726.24