Finding the Fourth Proportional to 43,813, 65,719.86 and 12,648.52

Step by Step Solution

1. Step 1: Write the proportion equation
   43,813 : 65,719.86 = 12,648.52 : x
2. Step 2: Convert to fraction form
   43,813/65,719.86 = 12,648.52/x
3. Step 3: Cross multiply
   43,813x = 65,719.86 × 12,648.52
4. Step 4: Simplify right side
   43,813x = 831,258,963.61
5. Step 5: Solve for x
   x = 831,258,963.61/43,813
6. Step 6: Final answer
   x = 18,972.88