Finding the Fourth Proportional to 31,938.31, 43,755.70 and 30,741.18

Step by Step Solution

1. Step 1: Write the proportion equation
   31,938.31 : 43,755.70 = 30,741.18 : x
2. Step 2: Convert to fraction form
   31,938.31/43,755.70 = 30,741.18/x
3. Step 3: Cross multiply
   31,938.31x = 43,755.70 × 30,741.18
4. Step 4: Simplify right side
   31,938.31x = 1,345,101,696.02
5. Step 5: Solve for x
   x = 1,345,101,696.02/31,938.31
6. Step 6: Final answer
   x = 42,115.62