Finding the Fourth Proportional to 72,938.10, 109,418.68 and 31,385.46

Step by Step Solution

1. Step 1: Write the proportion equation
   72,938.10 : 109,418.68 = 31,385.46 : x
2. Step 2: Convert to fraction form
   72,938.10/109,418.68 = 31,385.46/x
3. Step 3: Cross multiply
   72,938.10x = 109,418.68 × 31,385.46
4. Step 4: Simplify right side
   72,938.10x = 3,434,155,604.39
5. Step 5: Solve for x
   x = 3,434,155,604.39/72,938.10
6. Step 6: Final answer
   x = 47,083.15