Finding the Fourth Proportional to 7,321.06, 10,102.28 and 5,407.89

Step by Step Solution

1. Step 1: Write the proportion equation
   7,321.06 : 10,102.28 = 5,407.89 : x
2. Step 2: Convert to fraction form
   7,321.06/10,102.28 = 5,407.89/x
3. Step 3: Cross multiply
   7,321.06x = 10,102.28 × 5,407.89
4. Step 4: Simplify right side
   7,321.06x = 54,632,018.99
5. Step 5: Solve for x
   x = 54,632,018.99/7,321.06
6. Step 6: Final answer
   x = 7,462.31