Finding the Fourth Proportional to 8,321.57, 12,478.16 and 2,772.93

Step by Step Solution

1. Step 1: Write the proportion equation
   8,321.57 : 12,478.16 = 2,772.93 : x
2. Step 2: Convert to fraction form
   8,321.57/12,478.16 = 2,772.93/x
3. Step 3: Cross multiply
   8,321.57x = 12,478.16 × 2,772.93
4. Step 4: Simplify right side
   8,321.57x = 34,601,064.21
5. Step 5: Solve for x
   x = 34,601,064.21/8,321.57
6. Step 6: Final answer
   x = 4,158.00