Finding the Fourth Proportional to 86,973.57, 130,359.56 and 40,128.93

Step by Step Solution

1. Step 1: Write the proportion equation
   86,973.57 : 130,359.56 = 40,128.93 : x
2. Step 2: Convert to fraction form
   86,973.57/130,359.56 = 40,128.93/x
3. Step 3: Cross multiply
   86,973.57x = 130,359.56 × 40,128.93
4. Step 4: Simplify right side
   86,973.57x = 5,231,189,457.43
5. Step 5: Solve for x
   x = 5,231,189,457.43/86,973.57
6. Step 6: Final answer
   x = 60,146.89