Finding the Fourth Proportional to 42,018.13, 57,986.23 and 23,156.47

Step by Step Solution

1. Step 1: Write the proportion equation
   42,018.13 : 57,986.23 = 23,156.47 : x
2. Step 2: Convert to fraction form
   42,018.13/57,986.23 = 23,156.47/x
3. Step 3: Cross multiply
   42,018.13x = 57,986.23 × 23,156.47
4. Step 4: Simplify right side
   42,018.13x = 1,342,756,047.59
5. Step 5: Solve for x
   x = 1,342,756,047.59/42,018.13
6. Step 6: Final answer
   x = 31,956.59