Finding the Fourth Proportional to 78,026.80, 116,842.20 and 42,926.80

Step by Step Solution

1. Step 1: Write the proportion equation
   78,026.80 : 116,842.20 = 42,926.80 : x
2. Step 2: Convert to fraction form
   78,026.80/116,842.20 = 42,926.80/x
3. Step 3: Cross multiply
   78,026.80x = 116,842.20 × 42,926.80
4. Step 4: Simplify right side
   78,026.80x = 5,015,661,750.96
5. Step 5: Solve for x
   x = 5,015,661,750.96/78,026.80
6. Step 6: Final answer
   x = 64,281.27