Finding the Fourth Proportional to 31,155.51, 42,993.39 and 17,008.47

Step by Step Solution

1. Step 1: Write the proportion equation
   31,155.51 : 42,993.39 = 17,008.47 : x
2. Step 2: Convert to fraction form
   31,155.51/42,993.39 = 17,008.47/x
3. Step 3: Cross multiply
   31,155.51x = 42,993.39 × 17,008.47
4. Step 4: Simplify right side
   31,155.51x = 731,251,784.01
5. Step 5: Solve for x
   x = 731,251,784.01/31,155.51
6. Step 6: Final answer
   x = 23,471.03