Finding the Fourth Proportional to 81,849.35, 122,839.64 and 42,417.74

Step by Step Solution

1. Step 1: Write the proportion equation
   81,849.35 : 122,839.64 = 42,417.74 : x
2. Step 2: Convert to fraction form
   81,849.35/122,839.64 = 42,417.74/x
3. Step 3: Cross multiply
   81,849.35x = 122,839.64 × 42,417.74
4. Step 4: Simplify right side
   81,849.35x = 5,210,580,165.29
5. Step 5: Solve for x
   x = 5,210,580,165.29/81,849.35
6. Step 6: Final answer
   x = 63,660.62