Finding the Fourth Proportional to 78,514.81, 117,700.94 and 28,559.59

Step by Step Solution

1. Step 1: Write the proportion equation
   78,514.81 : 117,700.94 = 28,559.59 : x
2. Step 2: Convert to fraction form
   78,514.81/117,700.94 = 28,559.59/x
3. Step 3: Cross multiply
   78,514.81x = 117,700.94 × 28,559.59
4. Step 4: Simplify right side
   78,514.81x = 3,361,490,589.01
5. Step 5: Solve for x
   x = 3,361,490,589.01/78,514.81
6. Step 6: Final answer
   x = 42,813.46