Finding the Fourth Proportional to 31,407.12, 47,100.60 and 13,876.56

Step by Step Solution

1. Step 1: Write the proportion equation
   31,407.12 : 47,100.60 = 13,876.56 : x
2. Step 2: Convert to fraction form
   31,407.12/47,100.60 = 13,876.56/x
3. Step 3: Cross multiply
   31,407.12x = 47,100.60 × 13,876.56
4. Step 4: Simplify right side
   31,407.12x = 653,594,301.94
5. Step 5: Solve for x
   x = 653,594,301.94/31,407.12
6. Step 6: Final answer
   x = 20,810.39