Finding the Fourth Proportional to 10,521.30, 15,784.42 and 3,125.82

Step by Step Solution

1. Step 1: Write the proportion equation
   10,521.30 : 15,784.42 = 3,125.82 : x
2. Step 2: Convert to fraction form
   10,521.30/15,784.42 = 3,125.82/x
3. Step 3: Cross multiply
   10,521.30x = 15,784.42 × 3,125.82
4. Step 4: Simplify right side
   10,521.30x = 49,339,255.72
5. Step 5: Solve for x
   x = 49,339,255.72/10,521.30
6. Step 6: Final answer
   x = 4,689.46