Finding the Fourth Proportional to 10,101.09, 15,154.72 and 5,174.21

Step by Step Solution

1. Step 1: Write the proportion equation
   10,101.09 : 15,154.72 = 5,174.21 : x
2. Step 2: Convert to fraction form
   10,101.09/15,154.72 = 5,174.21/x
3. Step 3: Cross multiply
   10,101.09x = 15,154.72 × 5,174.21
4. Step 4: Simplify right side
   10,101.09x = 78,413,703.77
5. Step 5: Solve for x
   x = 78,413,703.77/10,101.09
6. Step 6: Final answer
   x = 7,762.90