Finding the Fourth Proportional to 127,608.31, 191,530.88 and 64,472.78

Step by Step Solution

1. Step 1: Write the proportion equation
   127,608.31 : 191,530.88 = 64,472.78 : x
2. Step 2: Convert to fraction form
   127,608.31/191,530.88 = 64,472.78/x
3. Step 3: Cross multiply
   127,608.31x = 191,530.88 × 64,472.78
4. Step 4: Simplify right side
   127,608.31x = 12,348,527,610.32
5. Step 5: Solve for x
   x = 12,348,527,610.32/127,608.31
6. Step 6: Final answer
   x = 96,768.99