Finding the Fourth Proportional to 78,039.06, 107,694.18 and 42,229.07

Step by Step Solution

1. Step 1: Write the proportion equation
   78,039.06 : 107,694.18 = 42,229.07 : x
2. Step 2: Convert to fraction form
   78,039.06/107,694.18 = 42,229.07/x
3. Step 3: Cross multiply
   78,039.06x = 107,694.18 × 42,229.07
4. Step 4: Simplify right side
   78,039.06x = 4,547,825,065.81
5. Step 5: Solve for x
   x = 4,547,825,065.81/78,039.06
6. Step 6: Final answer
   x = 58,276.27