Finding the Fourth Proportional to 10,387.89, 15,572.56 and 3,812.55

Step by Step Solution

1. Step 1: Write the proportion equation
   10,387.89 : 15,572.56 = 3,812.55 : x
2. Step 2: Convert to fraction form
   10,387.89/15,572.56 = 3,812.55/x
3. Step 3: Cross multiply
   10,387.89x = 15,572.56 × 3,812.55
4. Step 4: Simplify right side
   10,387.89x = 59,371,163.63
5. Step 5: Solve for x
   x = 59,371,163.63/10,387.89
6. Step 6: Final answer
   x = 5,715.42