Finding the Fourth Proportional to 78,245.94, 107,978.79 and 42,436.02

Step by Step Solution

1. Step 1: Write the proportion equation
   78,245.94 : 107,978.79 = 42,436.02 : x
2. Step 2: Convert to fraction form
   78,245.94/107,978.79 = 42,436.02/x
3. Step 3: Cross multiply
   78,245.94x = 107,978.79 × 42,436.02
4. Step 4: Simplify right side
   78,245.94x = 4,582,190,092.02
5. Step 5: Solve for x
   x = 4,582,190,092.02/78,245.94
6. Step 6: Final answer
   x = 58,561.38