Finding the Fourth Proportional to 8,156.35, 12,288.89 and 7,377.22

Step by Step Solution

1. Step 1: Write the proportion equation
   8,156.35 : 12,288.89 = 7,377.22 : x
2. Step 2: Convert to fraction form
   8,156.35/12,288.89 = 7,377.22/x
3. Step 3: Cross multiply
   8,156.35x = 12,288.89 × 7,377.22
4. Step 4: Simplify right side
   8,156.35x = 90,657,845.09
5. Step 5: Solve for x
   x = 90,657,845.09/8,156.35
6. Step 6: Final answer
   x = 11,115.00