Finding the Fourth Proportional to 42,018.51, 57,985.56 and 23,155.65

Step by Step Solution

1. Step 1: Write the proportion equation
   42,018.51 : 57,985.56 = 23,155.65 : x
2. Step 2: Convert to fraction form
   42,018.51/57,985.56 = 23,155.65/x
3. Step 3: Cross multiply
   42,018.51x = 57,985.56 × 23,155.65
4. Step 4: Simplify right side
   42,018.51x = 1,342,693,332.41
5. Step 5: Solve for x
   x = 1,342,693,332.41/42,018.51
6. Step 6: Final answer
   x = 31,954.81