Finding the Fourth Proportional to 8,781.50, 12,118.47 and 5,055.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,781.50 : 12,118.47 = 5,055.50 : x
2. Step 2: Convert to fraction form
   8,781.50/12,118.47 = 5,055.50/x
3. Step 3: Cross multiply
   8,781.50x = 12,118.47 × 5,055.50
4. Step 4: Simplify right side
   8,781.50x = 61,264,925.09
5. Step 5: Solve for x
   x = 61,264,925.09/8,781.50
6. Step 6: Final answer
   x = 6,976.59