Finding the Fourth Proportional to 10,385.88, 15,580.86 and 3,812.10

Step by Step Solution

1. Step 1: Write the proportion equation
   10,385.88 : 15,580.86 = 3,812.10 : x
2. Step 2: Convert to fraction form
   10,385.88/15,580.86 = 3,812.10/x
3. Step 3: Cross multiply
   10,385.88x = 15,580.86 × 3,812.10
4. Step 4: Simplify right side
   10,385.88x = 59,395,796.41
5. Step 5: Solve for x
   x = 59,395,796.41/10,385.88
6. Step 6: Final answer
   x = 5,718.90