Finding the Fourth Proportional to 8,772.12, 12,097.98 and 7,816.32

Step by Step Solution

1. Step 1: Write the proportion equation
   8,772.12 : 12,097.98 = 7,816.32 : x
2. Step 2: Convert to fraction form
   8,772.12/12,097.98 = 7,816.32/x
3. Step 3: Cross multiply
   8,772.12x = 12,097.98 × 7,816.32
4. Step 4: Simplify right side
   8,772.12x = 94,561,683.03
5. Step 5: Solve for x
   x = 94,561,683.03/8,772.12
6. Step 6: Final answer
   x = 10,779.80