Finding the Fourth Proportional to 115,886.01, 159,938.90 and 83,724.72

Step by Step Solution

1. Step 1: Write the proportion equation
   115,886.01 : 159,938.90 = 83,724.72 : x
2. Step 2: Convert to fraction form
   115,886.01/159,938.90 = 83,724.72/x
3. Step 3: Cross multiply
   115,886.01x = 159,938.90 × 83,724.72
4. Step 4: Simplify right side
   115,886.01x = 13,390,838,401.29
5. Step 5: Solve for x
   x = 13,390,838,401.29/115,886.01
6. Step 6: Final answer
   x = 115,551.82