Finding the Fourth Proportional to 86,401.13, 129,499.86 and 38,960.67

Step by Step Solution

1. Step 1: Write the proportion equation
   86,401.13 : 129,499.86 = 38,960.67 : x
2. Step 2: Convert to fraction form
   86,401.13/129,499.86 = 38,960.67/x
3. Step 3: Cross multiply
   86,401.13x = 129,499.86 × 38,960.67
4. Step 4: Simplify right side
   86,401.13x = 5,045,401,310.51
5. Step 5: Solve for x
   x = 5,045,401,310.51/86,401.13
6. Step 6: Final answer
   x = 58,395.09