Finding the Fourth Proportional to 102,367.57, 153,457.80 and 86,673.72

Step by Step Solution

1. Step 1: Write the proportion equation
   102,367.57 : 153,457.80 = 86,673.72 : x
2. Step 2: Convert to fraction form
   102,367.57/153,457.80 = 86,673.72/x
3. Step 3: Cross multiply
   102,367.57x = 153,457.80 × 86,673.72
4. Step 4: Simplify right side
   102,367.57x = 13,300,758,389.02
5. Step 5: Solve for x
   x = 13,300,758,389.02/102,367.57
6. Step 6: Final answer
   x = 129,931.37