Finding the Fourth Proportional to 78,426.09, 117,572.99 and 34,019.42

Step by Step Solution

1. Step 1: Write the proportion equation
   78,426.09 : 117,572.99 = 34,019.42 : x
2. Step 2: Convert to fraction form
   78,426.09/117,572.99 = 34,019.42/x
3. Step 3: Cross multiply
   78,426.09x = 117,572.99 × 34,019.42
4. Step 4: Simplify right side
   78,426.09x = 3,999,764,169.50
5. Step 5: Solve for x
   x = 3,999,764,169.50/78,426.09
6. Step 6: Final answer
   x = 51,000.43