Finding the Fourth Proportional to 1,342.45, 1,853.40 and 877.51

Step by Step Solution

1. Step 1: Write the proportion equation
   1,342.45 : 1,853.40 = 877.51 : x
2. Step 2: Convert to fraction form
   1,342.45/1,853.40 = 877.51/x
3. Step 3: Cross multiply
   1,342.45x = 1,853.40 × 877.51
4. Step 4: Simplify right side
   1,342.45x = 1,626,379.54
5. Step 5: Solve for x
   x = 1,626,379.54/1,342.45
6. Step 6: Final answer
   x = 1,211.50