Finding the Fourth Proportional to 78,710.94, 108,620.46 and 42,900.30

Step by Step Solution

1. Step 1: Write the proportion equation
   78,710.94 : 108,620.46 = 42,900.30 : x
2. Step 2: Convert to fraction form
   78,710.94/108,620.46 = 42,900.30/x
3. Step 3: Cross multiply
   78,710.94x = 108,620.46 × 42,900.30
4. Step 4: Simplify right side
   78,710.94x = 4,659,850,320.14
5. Step 5: Solve for x
   x = 4,659,850,320.14/78,710.94
6. Step 6: Final answer
   x = 59,202.07