Finding the Fourth Proportional to 10,522.15, 15,780.53 and 3,124.89

Step by Step Solution

1. Step 1: Write the proportion equation
   10,522.15 : 15,780.53 = 3,124.89 : x
2. Step 2: Convert to fraction form
   10,522.15/15,780.53 = 3,124.89/x
3. Step 3: Cross multiply
   10,522.15x = 15,780.53 × 3,124.89
4. Step 4: Simplify right side
   10,522.15x = 49,312,420.39
5. Step 5: Solve for x
   x = 49,312,420.39/10,522.15
6. Step 6: Final answer
   x = 4,686.53