Finding the Fourth Proportional to 78,235.92, 107,965.55 and 42,426

Step by Step Solution

1. Step 1: Write the proportion equation
   78,235.92 : 107,965.55 = 42,426 : x
2. Step 2: Convert to fraction form
   78,235.92/107,965.55 = 42,426/x
3. Step 3: Cross multiply
   78,235.92x = 107,965.55 × 42,426
4. Step 4: Simplify right side
   78,235.92x = 4,580,546,530.37
5. Step 5: Solve for x
   x = 4,580,546,530.37/78,235.92
6. Step 6: Final answer
   x = 58,547.87