Finding the Fourth Proportional to 78,069.09, 107,735.40 and 42,259.40

Step by Step Solution

1. Step 1: Write the proportion equation
   78,069.09 : 107,735.40 = 42,259.40 : x
2. Step 2: Convert to fraction form
   78,069.09/107,735.40 = 42,259.40/x
3. Step 3: Cross multiply
   78,069.09x = 107,735.40 × 42,259.40
4. Step 4: Simplify right side
   78,069.09x = 4,552,833,228.09
5. Step 5: Solve for x
   x = 4,552,833,228.09/78,069.09
6. Step 6: Final answer
   x = 58,318.00