Finding the Fourth Proportional to 78,239.19, 107,969.49 and 42,429.27

Step by Step Solution

1. Step 1: Write the proportion equation
   78,239.19 : 107,969.49 = 42,429.27 : x
2. Step 2: Convert to fraction form
   78,239.19/107,969.49 = 42,429.27/x
3. Step 3: Cross multiply
   78,239.19x = 107,969.49 × 42,429.27
4. Step 4: Simplify right side
   78,239.19x = 4,581,066,642.97
5. Step 5: Solve for x
   x = 4,581,066,642.97/78,239.19
6. Step 6: Final answer
   x = 58,552.07