Finding the Fourth Proportional to 64,839.24, 89,495.10 and 42,240.24

Step by Step Solution

1. Step 1: Write the proportion equation
   64,839.24 : 89,495.10 = 42,240.24 : x
2. Step 2: Convert to fraction form
   64,839.24/89,495.10 = 42,240.24/x
3. Step 3: Cross multiply
   64,839.24x = 89,495.10 × 42,240.24
4. Step 4: Simplify right side
   64,839.24x = 3,780,294,502.82
5. Step 5: Solve for x
   x = 3,780,294,502.82/64,839.24
6. Step 6: Final answer
   x = 58,302.57