Finding the Fourth Proportional to 53,789.50, 74,229.51 and 31,433.50

Step by Step Solution

1. Step 1: Write the proportion equation
   53,789.50 : 74,229.51 = 31,433.50 : x
2. Step 2: Convert to fraction form
   53,789.50/74,229.51 = 31,433.50/x
3. Step 3: Cross multiply
   53,789.50x = 74,229.51 × 31,433.50
4. Step 4: Simplify right side
   53,789.50x = 2,333,293,302.59
5. Step 5: Solve for x
   x = 2,333,293,302.59/53,789.50
6. Step 6: Final answer
   x = 43,378.23