Finding the Fourth Proportional to 42,021.86, 57,990.16 and 23,158.98

Step by Step Solution

1. Step 1: Write the proportion equation
   42,021.86 : 57,990.16 = 23,158.98 : x
2. Step 2: Convert to fraction form
   42,021.86/57,990.16 = 23,158.98/x
3. Step 3: Cross multiply
   42,021.86x = 57,990.16 × 23,158.98
4. Step 4: Simplify right side
   42,021.86x = 1,342,993,158.51
5. Step 5: Solve for x
   x = 1,342,993,158.51/42,021.86
6. Step 6: Final answer
   x = 31,959.40