Finding the Fourth Proportional to 8,892.81, 12,262.86 and 7,638.01

Step by Step Solution

1. Step 1: Write the proportion equation
   8,892.81 : 12,262.86 = 7,638.01 : x
2. Step 2: Convert to fraction form
   8,892.81/12,262.86 = 7,638.01/x
3. Step 3: Cross multiply
   8,892.81x = 12,262.86 × 7,638.01
4. Step 4: Simplify right side
   8,892.81x = 93,663,816.65
5. Step 5: Solve for x
   x = 93,663,816.65/8,892.81
6. Step 6: Final answer
   x = 10,532.53