Finding the Fourth Proportional to 53,665.89, 74,068.37 and 31,005.74

Step by Step Solution

1. Step 1: Write the proportion equation
   53,665.89 : 74,068.37 = 31,005.74 : x
2. Step 2: Convert to fraction form
   53,665.89/74,068.37 = 31,005.74/x
3. Step 3: Cross multiply
   53,665.89x = 74,068.37 × 31,005.74
4. Step 4: Simplify right side
   53,665.89x = 2,296,544,097.07
5. Step 5: Solve for x
   x = 2,296,544,097.07/53,665.89
6. Step 6: Final answer
   x = 42,793.37