Finding the Fourth Proportional to 78,485.27, 117,780.24 and 28,565.36

Step by Step Solution

1. Step 1: Write the proportion equation
   78,485.27 : 117,780.24 = 28,565.36 : x
2. Step 2: Convert to fraction form
   78,485.27/117,780.24 = 28,565.36/x
3. Step 3: Cross multiply
   78,485.27x = 117,780.24 × 28,565.36
4. Step 4: Simplify right side
   78,485.27x = 3,364,434,367.59
5. Step 5: Solve for x
   x = 3,364,434,367.59/78,485.27
6. Step 6: Final answer
   x = 42,867.08