Finding the Fourth Proportional to 10,108.81, 15,156.33 and 5,174.43

Step by Step Solution

1. Step 1: Write the proportion equation
   10,108.81 : 15,156.33 = 5,174.43 : x
2. Step 2: Convert to fraction form
   10,108.81/15,156.33 = 5,174.43/x
3. Step 3: Cross multiply
   10,108.81x = 15,156.33 × 5,174.43
4. Step 4: Simplify right side
   10,108.81x = 78,425,368.64
5. Step 5: Solve for x
   x = 78,425,368.64/10,108.81
6. Step 6: Final answer
   x = 7,758.12