Finding the Fourth Proportional to 42,020.90, 57,991 and 23,158.02

Step by Step Solution

1. Step 1: Write the proportion equation
   42,020.90 : 57,991 = 23,158.02 : x
2. Step 2: Convert to fraction form
   42,020.90/57,991 = 23,158.02/x
3. Step 3: Cross multiply
   42,020.90x = 57,991 × 23,158.02
4. Step 4: Simplify right side
   42,020.90x = 1,342,956,737.82
5. Step 5: Solve for x
   x = 1,342,956,737.82/42,020.90
6. Step 6: Final answer
   x = 31,959.26