Finding the Fourth Proportional to 127,772.64, 191,693.52 and 72,407.52

Step by Step Solution

1. Step 1: Write the proportion equation
   127,772.64 : 191,693.52 = 72,407.52 : x
2. Step 2: Convert to fraction form
   127,772.64/191,693.52 = 72,407.52/x
3. Step 3: Cross multiply
   127,772.64x = 191,693.52 × 72,407.52
4. Step 4: Simplify right side
   127,772.64x = 13,880,052,383.27
5. Step 5: Solve for x
   x = 13,880,052,383.27/127,772.64
6. Step 6: Final answer
   x = 108,630.86