Finding the Fourth Proportional to 8,761.77, 12,061.71 and 7,919.98

Step by Step Solution

1. Step 1: Write the proportion equation
   8,761.77 : 12,061.71 = 7,919.98 : x
2. Step 2: Convert to fraction form
   8,761.77/12,061.71 = 7,919.98/x
3. Step 3: Cross multiply
   8,761.77x = 12,061.71 × 7,919.98
4. Step 4: Simplify right side
   8,761.77x = 95,528,471.81
5. Step 5: Solve for x
   x = 95,528,471.81/8,761.77
6. Step 6: Final answer
   x = 10,902.87