Finding the Fourth Proportional to 5,892.16, 8,121.72 and 4,900.72

Step by Step Solution

1. Step 1: Write the proportion equation
   5,892.16 : 8,121.72 = 4,900.72 : x
2. Step 2: Convert to fraction form
   5,892.16/8,121.72 = 4,900.72/x
3. Step 3: Cross multiply
   5,892.16x = 8,121.72 × 4,900.72
4. Step 4: Simplify right side
   5,892.16x = 39,802,275.64
5. Step 5: Solve for x
   x = 39,802,275.64/5,892.16
6. Step 6: Final answer
   x = 6,755.12