Finding the Fourth Proportional to 78,288.45, 108,037.91 and 42,478.45

Step by Step Solution

1. Step 1: Write the proportion equation
   78,288.45 : 108,037.91 = 42,478.45 : x
2. Step 2: Convert to fraction form
   78,288.45/108,037.91 = 42,478.45/x
3. Step 3: Cross multiply
   78,288.45x = 108,037.91 × 42,478.45
4. Step 4: Simplify right side
   78,288.45x = 4,589,282,958.04
5. Step 5: Solve for x
   x = 4,589,282,958.04/78,288.45
6. Step 6: Final answer
   x = 58,620.18