Finding the Fourth Proportional to 10,111.74, 15,157.22 and 3,870.29

Step by Step Solution

1. Step 1: Write the proportion equation
   10,111.74 : 15,157.22 = 3,870.29 : x
2. Step 2: Convert to fraction form
   10,111.74/15,157.22 = 3,870.29/x
3. Step 3: Cross multiply
   10,111.74x = 15,157.22 × 3,870.29
4. Step 4: Simplify right side
   10,111.74x = 58,662,741.86
5. Step 5: Solve for x
   x = 58,662,741.86/10,111.74
6. Step 6: Final answer
   x = 5,801.45