Finding the Fourth Proportional to 78,205.20, 107,923.32 and 42,395.10

Step by Step Solution

1. Step 1: Write the proportion equation
   78,205.20 : 107,923.32 = 42,395.10 : x
2. Step 2: Convert to fraction form
   78,205.20/107,923.32 = 42,395.10/x
3. Step 3: Cross multiply
   78,205.20x = 107,923.32 × 42,395.10
4. Step 4: Simplify right side
   78,205.20x = 4,575,419,943.73
5. Step 5: Solve for x
   x = 4,575,419,943.73/78,205.20
6. Step 6: Final answer
   x = 58,505.32