Finding the Fourth Proportional to 3,725.15, 5,586.80 and 1,259.91

Step by Step Solution

1. Step 1: Write the proportion equation
   3,725.15 : 5,586.80 = 1,259.91 : x
2. Step 2: Convert to fraction form
   3,725.15/5,586.80 = 1,259.91/x
3. Step 3: Cross multiply
   3,725.15x = 5,586.80 × 1,259.91
4. Step 4: Simplify right side
   3,725.15x = 7,038,858.89
5. Step 5: Solve for x
   x = 7,038,858.89/3,725.15
6. Step 6: Final answer
   x = 1,889.55