Finding the Fourth Proportional to 10,147.93, 15,223.34 and 3,128.53

Step by Step Solution

1. Step 1: Write the proportion equation
   10,147.93 : 15,223.34 = 3,128.53 : x
2. Step 2: Convert to fraction form
   10,147.93/15,223.34 = 3,128.53/x
3. Step 3: Cross multiply
   10,147.93x = 15,223.34 × 3,128.53
4. Step 4: Simplify right side
   10,147.93x = 47,626,675.89
5. Step 5: Solve for x
   x = 47,626,675.89/10,147.93
6. Step 6: Final answer
   x = 4,693.24