Finding the Fourth Proportional to 115,805.30, 159,479.69 and 99,541.31

Step by Step Solution

1. Step 1: Write the proportion equation
   115,805.30 : 159,479.69 = 99,541.31 : x
2. Step 2: Convert to fraction form
   115,805.30/159,479.69 = 99,541.31/x
3. Step 3: Cross multiply
   115,805.30x = 159,479.69 × 99,541.31
4. Step 4: Simplify right side
   115,805.30x = 15,874,815,965.89
5. Step 5: Solve for x
   x = 15,874,815,965.89/115,805.30
6. Step 6: Final answer
   x = 137,081.95