Finding the Fourth Proportional to 7,123.86, 10,686.72 and 3,175.14

Step by Step Solution

1. Step 1: Write the proportion equation
   7,123.86 : 10,686.72 = 3,175.14 : x
2. Step 2: Convert to fraction form
   7,123.86/10,686.72 = 3,175.14/x
3. Step 3: Cross multiply
   7,123.86x = 10,686.72 × 3,175.14
4. Step 4: Simplify right side
   7,123.86x = 33,931,832.14
5. Step 5: Solve for x
   x = 33,931,832.14/7,123.86
6. Step 6: Final answer
   x = 4,763.12