Finding the Fourth Proportional to 42,012.88, 57,978.99 and 23,151.22

Step by Step Solution

1. Step 1: Write the proportion equation
   42,012.88 : 57,978.99 = 23,151.22 : x
2. Step 2: Convert to fraction form
   42,012.88/57,978.99 = 23,151.22/x
3. Step 3: Cross multiply
   42,012.88x = 57,978.99 × 23,151.22
4. Step 4: Simplify right side
   42,012.88x = 1,342,283,947.22
5. Step 5: Solve for x
   x = 1,342,283,947.22/42,012.88
6. Step 6: Final answer
   x = 31,949.35