Finding the Fourth Proportional to 42,989.31, 64,169.54 and 39,823.29

Step by Step Solution

1. Step 1: Write the proportion equation
   42,989.31 : 64,169.54 = 39,823.29 : x
2. Step 2: Convert to fraction form
   42,989.31/64,169.54 = 39,823.29/x
3. Step 3: Cross multiply
   42,989.31x = 64,169.54 × 39,823.29
4. Step 4: Simplify right side
   42,989.31x = 2,555,442,001.47
5. Step 5: Solve for x
   x = 2,555,442,001.47/42,989.31
6. Step 6: Final answer
   x = 59,443.66