Finding the Fourth Proportional to 127,539.78, 191,227.65 and 60,978.42

Step by Step Solution

1. Step 1: Write the proportion equation
   127,539.78 : 191,227.65 = 60,978.42 : x
2. Step 2: Convert to fraction form
   127,539.78/191,227.65 = 60,978.42/x
3. Step 3: Cross multiply
   127,539.78x = 191,227.65 × 60,978.42
4. Step 4: Simplify right side
   127,539.78x = 11,660,759,957.31
5. Step 5: Solve for x
   x = 11,660,759,957.31/127,539.78
6. Step 6: Final answer
   x = 91,428.42