Finding the Fourth Proportional to 7,131.60, 10,700.42 and 3,840.86

Step by Step Solution

1. Step 1: Write the proportion equation
   7,131.60 : 10,700.42 = 3,840.86 : x
2. Step 2: Convert to fraction form
   7,131.60/10,700.42 = 3,840.86/x
3. Step 3: Cross multiply
   7,131.60x = 10,700.42 × 3,840.86
4. Step 4: Simplify right side
   7,131.60x = 41,098,815.16
5. Step 5: Solve for x
   x = 41,098,815.16/7,131.60
6. Step 6: Final answer
   x = 5,762.92