Finding the Fourth Proportional to 31,128.01, 42,955.71 and 17,516.81

Step by Step Solution

1. Step 1: Write the proportion equation
   31,128.01 : 42,955.71 = 17,516.81 : x
2. Step 2: Convert to fraction form
   31,128.01/42,955.71 = 17,516.81/x
3. Step 3: Cross multiply
   31,128.01x = 42,955.71 × 17,516.81
4. Step 4: Simplify right side
   31,128.01x = 752,446,810.56
5. Step 5: Solve for x
   x = 752,446,810.56/31,128.01
6. Step 6: Final answer
   x = 24,172.66