Finding the Fourth Proportional to 78,212.93, 107,934.39 and 42,403.50

Step by Step Solution

1. Step 1: Write the proportion equation
   78,212.93 : 107,934.39 = 42,403.50 : x
2. Step 2: Convert to fraction form
   78,212.93/107,934.39 = 42,403.50/x
3. Step 3: Cross multiply
   78,212.93x = 107,934.39 × 42,403.50
4. Step 4: Simplify right side
   78,212.93x = 4,576,795,906.37
5. Step 5: Solve for x
   x = 4,576,795,906.37/78,212.93
6. Step 6: Final answer
   x = 58,517.13