Finding the Fourth Proportional to 10,120.17, 13,965.69 and 5,870.91

Step by Step Solution

1. Step 1: Write the proportion equation
   10,120.17 : 13,965.69 = 5,870.91 : x
2. Step 2: Convert to fraction form
   10,120.17/13,965.69 = 5,870.91/x
3. Step 3: Cross multiply
   10,120.17x = 13,965.69 × 5,870.91
4. Step 4: Simplify right side
   10,120.17x = 81,991,309.08
5. Step 5: Solve for x
   x = 81,991,309.08/10,120.17
6. Step 6: Final answer
   x = 8,101.77