Finding the Fourth Proportional to 127,615.52, 191,088.86 and 89,971.79

Step by Step Solution

1. Step 1: Write the proportion equation
   127,615.52 : 191,088.86 = 89,971.79 : x
2. Step 2: Convert to fraction form
   127,615.52/191,088.86 = 89,971.79/x
3. Step 3: Cross multiply
   127,615.52x = 191,088.86 × 89,971.79
4. Step 4: Simplify right side
   127,615.52x = 17,192,605,377.96
5. Step 5: Solve for x
   x = 17,192,605,377.96/127,615.52
6. Step 6: Final answer
   x = 134,721.90