Finding the Fourth Proportional to 92,128.85, 127,092.71 and 56,256.79

Step by Step Solution

1. Step 1: Write the proportion equation
   92,128.85 : 127,092.71 = 56,256.79 : x
2. Step 2: Convert to fraction form
   92,128.85/127,092.71 = 56,256.79/x
3. Step 3: Cross multiply
   92,128.85x = 127,092.71 × 56,256.79
4. Step 4: Simplify right side
   92,128.85x = 7,149,827,261.54
5. Step 5: Solve for x
   x = 7,149,827,261.54/92,128.85
6. Step 6: Final answer
   x = 77,606.82