Finding the Fourth Proportional to 1,553.88, 2,141.55 and 1,259.85

Step by Step Solution

1. Step 1: Write the proportion equation
   1,553.88 : 2,141.55 = 1,259.85 : x
2. Step 2: Convert to fraction form
   1,553.88/2,141.55 = 1,259.85/x
3. Step 3: Cross multiply
   1,553.88x = 2,141.55 × 1,259.85
4. Step 4: Simplify right side
   1,553.88x = 2,698,031.77
5. Step 5: Solve for x
   x = 2,698,031.77/1,553.88
6. Step 6: Final answer
   x = 1,736.32