Finding the Fourth Proportional to 1,368.52, 1,877.17 and 1,356.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,368.52 : 1,877.17 = 1,356.80 : x
2. Step 2: Convert to fraction form
   1,368.52/1,877.17 = 1,356.80/x
3. Step 3: Cross multiply
   1,368.52x = 1,877.17 × 1,356.80
4. Step 4: Simplify right side
   1,368.52x = 2,546,944.26
5. Step 5: Solve for x
   x = 2,546,944.26/1,368.52
6. Step 6: Final answer
   x = 1,861.09