Finding the Fourth Proportional to 131,498.10, 196,987.32 and 86,990.22

Step by Step Solution

1. Step 1: Write the proportion equation
   131,498.10 : 196,987.32 = 86,990.22 : x
2. Step 2: Convert to fraction form
   131,498.10/196,987.32 = 86,990.22/x
3. Step 3: Cross multiply
   131,498.10x = 196,987.32 × 86,990.22
4. Step 4: Simplify right side
   131,498.10x = 17,135,970,304.01
5. Step 5: Solve for x
   x = 17,135,970,304.01/131,498.10
6. Step 6: Final answer
   x = 130,313.44