Finding the Fourth Proportional to 78,015.83, 107,661.83 and 42,205.86

Step by Step Solution

1. Step 1: Write the proportion equation
   78,015.83 : 107,661.83 = 42,205.86 : x
2. Step 2: Convert to fraction form
   78,015.83/107,661.83 = 42,205.86/x
3. Step 3: Cross multiply
   78,015.83x = 107,661.83 × 42,205.86
4. Step 4: Simplify right side
   78,015.83x = 4,543,959,913.29
5. Step 5: Solve for x
   x = 4,543,959,913.29/78,015.83
6. Step 6: Final answer
   x = 58,244.08