Finding the Fourth Proportional to 42,018.45, 57,985.17 and 23,155.57

Step by Step Solution

1. Step 1: Write the proportion equation
   42,018.45 : 57,985.17 = 23,155.57 : x
2. Step 2: Convert to fraction form
   42,018.45/57,985.17 = 23,155.57/x
3. Step 3: Cross multiply
   42,018.45x = 57,985.17 × 23,155.57
4. Step 4: Simplify right side
   42,018.45x = 1,342,679,662.90
5. Step 5: Solve for x
   x = 1,342,679,662.90/42,018.45
6. Step 6: Final answer
   x = 31,954.53