Finding the Fourth Proportional to 42,155.28, 58,171.80 and 23,031.26

Step by Step Solution

1. Step 1: Write the proportion equation
   42,155.28 : 58,171.80 = 23,031.26 : x
2. Step 2: Convert to fraction form
   42,155.28/58,171.80 = 23,031.26/x
3. Step 3: Cross multiply
   42,155.28x = 58,171.80 × 23,031.26
4. Step 4: Simplify right side
   42,155.28x = 1,339,769,559.61
5. Step 5: Solve for x
   x = 1,339,769,559.61/42,155.28
6. Step 6: Final answer
   x = 31,781.77