Finding the Fourth Proportional to 43,317.06, 64,391.07 and 42,040.05

Step by Step Solution

1. Step 1: Write the proportion equation
   43,317.06 : 64,391.07 = 42,040.05 : x
2. Step 2: Convert to fraction form
   43,317.06/64,391.07 = 42,040.05/x
3. Step 3: Cross multiply
   43,317.06x = 64,391.07 × 42,040.05
4. Step 4: Simplify right side
   43,317.06x = 2,707,003,802.35
5. Step 5: Solve for x
   x = 2,707,003,802.35/43,317.06
6. Step 6: Final answer
   x = 62,492.79