Finding the Fourth Proportional to 8,897.66, 12,280.65 and 7,404.12

Step by Step Solution

1. Step 1: Write the proportion equation
   8,897.66 : 12,280.65 = 7,404.12 : x
2. Step 2: Convert to fraction form
   8,897.66/12,280.65 = 7,404.12/x
3. Step 3: Cross multiply
   8,897.66x = 12,280.65 × 7,404.12
4. Step 4: Simplify right side
   8,897.66x = 90,927,378.51
5. Step 5: Solve for x
   x = 90,927,378.51/8,897.66
6. Step 6: Final answer
   x = 10,219.25