Finding the Fourth Proportional to 31,100.76, 46,658.49 and 12,381.87

Step by Step Solution

1. Step 1: Write the proportion equation
   31,100.76 : 46,658.49 = 12,381.87 : x
2. Step 2: Convert to fraction form
   31,100.76/46,658.49 = 12,381.87/x
3. Step 3: Cross multiply
   31,100.76x = 46,658.49 × 12,381.87
4. Step 4: Simplify right side
   31,100.76x = 577,719,357.58
5. Step 5: Solve for x
   x = 577,719,357.58/31,100.76
6. Step 6: Final answer
   x = 18,575.73