Finding the Fourth Proportional to 78,078.06, 107,748 and 42,268.50

Step by Step Solution

1. Step 1: Write the proportion equation
   78,078.06 : 107,748 = 42,268.50 : x
2. Step 2: Convert to fraction form
   78,078.06/107,748 = 42,268.50/x
3. Step 3: Cross multiply
   78,078.06x = 107,748 × 42,268.50
4. Step 4: Simplify right side
   78,078.06x = 4,554,346,338
5. Step 5: Solve for x
   x = 4,554,346,338/78,078.06
6. Step 6: Final answer
   x = 58,330.68