Finding the Fourth Proportional to 42,443.16, 58,538.70 and 31,108.38

Step by Step Solution

1. Step 1: Write the proportion equation
   42,443.16 : 58,538.70 = 31,108.38 : x
2. Step 2: Convert to fraction form
   42,443.16/58,538.70 = 31,108.38/x
3. Step 3: Cross multiply
   42,443.16x = 58,538.70 × 31,108.38
4. Step 4: Simplify right side
   42,443.16x = 1,821,044,124.31
5. Step 5: Solve for x
   x = 1,821,044,124.31/42,443.16
6. Step 6: Final answer
   x = 42,905.48