Finding the Fourth Proportional to 87,081.74, 130,536.49 and 42,019.97

Step by Step Solution

1. Step 1: Write the proportion equation
   87,081.74 : 130,536.49 = 42,019.97 : x
2. Step 2: Convert to fraction form
   87,081.74/130,536.49 = 42,019.97/x
3. Step 3: Cross multiply
   87,081.74x = 130,536.49 × 42,019.97
4. Step 4: Simplify right side
   87,081.74x = 5,485,139,393.71
5. Step 5: Solve for x
   x = 5,485,139,393.71/87,081.74
6. Step 6: Final answer
   x = 62,988.40