Finding the Fourth Proportional to 137,090.18, 189,131.28 and 86,081.24

Step by Step Solution

1. Step 1: Write the proportion equation
   137,090.18 : 189,131.28 = 86,081.24 : x
2. Step 2: Convert to fraction form
   137,090.18/189,131.28 = 86,081.24/x
3. Step 3: Cross multiply
   137,090.18x = 189,131.28 × 86,081.24
4. Step 4: Simplify right side
   137,090.18x = 16,280,655,105.19
5. Step 5: Solve for x
   x = 16,280,655,105.19/137,090.18
6. Step 6: Final answer
   x = 118,758.73