Finding the Fourth Proportional to 8,627.31, 12,931.74 and 4,921.56

Step by Step Solution

1. Step 1: Write the proportion equation
   8,627.31 : 12,931.74 = 4,921.56 : x
2. Step 2: Convert to fraction form
   8,627.31/12,931.74 = 4,921.56/x
3. Step 3: Cross multiply
   8,627.31x = 12,931.74 × 4,921.56
4. Step 4: Simplify right side
   8,627.31x = 63,644,334.31
5. Step 5: Solve for x
   x = 63,644,334.31/8,627.31
6. Step 6: Final answer
   x = 7,377.08