Finding the Fourth Proportional to 12,102.81, 18,155.34 and 4,707.83

Step by Step Solution

1. Step 1: Write the proportion equation
   12,102.81 : 18,155.34 = 4,707.83 : x
2. Step 2: Convert to fraction form
   12,102.81/18,155.34 = 4,707.83/x
3. Step 3: Cross multiply
   12,102.81x = 18,155.34 × 4,707.83
4. Step 4: Simplify right side
   12,102.81x = 85,472,254.31
5. Step 5: Solve for x
   x = 85,472,254.31/12,102.81
6. Step 6: Final answer
   x = 7,062.18