Finding the Fourth Proportional to 78,429.68, 108,233.62 and 42,619.72

Step by Step Solution

1. Step 1: Write the proportion equation
   78,429.68 : 108,233.62 = 42,619.72 : x
2. Step 2: Convert to fraction form
   78,429.68/108,233.62 = 42,619.72/x
3. Step 3: Cross multiply
   78,429.68x = 108,233.62 × 42,619.72
4. Step 4: Simplify right side
   78,429.68x = 4,612,886,578.99
5. Step 5: Solve for x
   x = 4,612,886,578.99/78,429.68
6. Step 6: Final answer
   x = 58,815.57