Finding the Fourth Proportional to 12,959.76, 19,439.37 and 3,725.76

Step by Step Solution

1. Step 1: Write the proportion equation
   12,959.76 : 19,439.37 = 3,725.76 : x
2. Step 2: Convert to fraction form
   12,959.76/19,439.37 = 3,725.76/x
3. Step 3: Cross multiply
   12,959.76x = 19,439.37 × 3,725.76
4. Step 4: Simplify right side
   12,959.76x = 72,426,427.17
5. Step 5: Solve for x
   x = 72,426,427.17/12,959.76
6. Step 6: Final answer
   x = 5,588.56