Finding the Fourth Proportional to 8,820.81, 12,151.58 and 7,557.84

Step by Step Solution

1. Step 1: Write the proportion equation
   8,820.81 : 12,151.58 = 7,557.84 : x
2. Step 2: Convert to fraction form
   8,820.81/12,151.58 = 7,557.84/x
3. Step 3: Cross multiply
   8,820.81x = 12,151.58 × 7,557.84
4. Step 4: Simplify right side
   8,820.81x = 91,839,659.60
5. Step 5: Solve for x
   x = 91,839,659.60/8,820.81
6. Step 6: Final answer
   x = 10,411.70