Finding the Fourth Proportional to 78,506.84, 117,791.72 and 28,590.41

Step by Step Solution

1. Step 1: Write the proportion equation
   78,506.84 : 117,791.72 = 28,590.41 : x
2. Step 2: Convert to fraction form
   78,506.84/117,791.72 = 28,590.41/x
3. Step 3: Cross multiply
   78,506.84x = 117,791.72 × 28,590.41
4. Step 4: Simplify right side
   78,506.84x = 3,367,713,569.41
5. Step 5: Solve for x
   x = 3,367,713,569.41/78,506.84
6. Step 6: Final answer
   x = 42,897.07