Finding the Fourth Proportional to 12,682.77, 19,026.55 and 3,915.64

Step by Step Solution

1. Step 1: Write the proportion equation
   12,682.77 : 19,026.55 = 3,915.64 : x
2. Step 2: Convert to fraction form
   12,682.77/19,026.55 = 3,915.64/x
3. Step 3: Cross multiply
   12,682.77x = 19,026.55 × 3,915.64
4. Step 4: Simplify right side
   12,682.77x = 74,501,062.89
5. Step 5: Solve for x
   x = 74,501,062.89/12,682.77
6. Step 6: Final answer
   x = 5,874.19