Finding the Fourth Proportional to 115,091.91, 158,870.03 and 85,118.47

Step by Step Solution

1. Step 1: Write the proportion equation
   115,091.91 : 158,870.03 = 85,118.47 : x
2. Step 2: Convert to fraction form
   115,091.91/158,870.03 = 85,118.47/x
3. Step 3: Cross multiply
   115,091.91x = 158,870.03 × 85,118.47
4. Step 4: Simplify right side
   115,091.91x = 13,522,773,059.69
5. Step 5: Solve for x
   x = 13,522,773,059.69/115,091.91
6. Step 6: Final answer
   x = 117,495.43