Finding the Fourth Proportional to 8,316.72, 12,477.51 and 3,123

Step by Step Solution

1. Step 1: Write the proportion equation
   8,316.72 : 12,477.51 = 3,123 : x
2. Step 2: Convert to fraction form
   8,316.72/12,477.51 = 3,123/x
3. Step 3: Cross multiply
   8,316.72x = 12,477.51 × 3,123
4. Step 4: Simplify right side
   8,316.72x = 38,967,263.73
5. Step 5: Solve for x
   x = 38,967,263.73/8,316.72
6. Step 6: Final answer
   x = 4,685.41