Finding the Fourth Proportional to 8,780.17, 12,116.63 and 4,801.31

Step by Step Solution

1. Step 1: Write the proportion equation
   8,780.17 : 12,116.63 = 4,801.31 : x
2. Step 2: Convert to fraction form
   8,780.17/12,116.63 = 4,801.31/x
3. Step 3: Cross multiply
   8,780.17x = 12,116.63 × 4,801.31
4. Step 4: Simplify right side
   8,780.17x = 58,175,696.79
5. Step 5: Solve for x
   x = 58,175,696.79/8,780.17
6. Step 6: Final answer
   x = 6,625.81