Finding the Fourth Proportional to 10,499.91, 14,490.18 and 5,720.16

Step by Step Solution

1. Step 1: Write the proportion equation
   10,499.91 : 14,490.18 = 5,720.16 : x
2. Step 2: Convert to fraction form
   10,499.91/14,490.18 = 5,720.16/x
3. Step 3: Cross multiply
   10,499.91x = 14,490.18 × 5,720.16
4. Step 4: Simplify right side
   10,499.91x = 82,886,148.03
5. Step 5: Solve for x
   x = 82,886,148.03/10,499.91
6. Step 6: Final answer
   x = 7,893.99