Finding the Fourth Proportional to 1,921.68, 2,877.90 and 1,097.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,921.68 : 2,877.90 = 1,097.46 : x
2. Step 2: Convert to fraction form
   1,921.68/2,877.90 = 1,097.46/x
3. Step 3: Cross multiply
   1,921.68x = 2,877.90 × 1,097.46
4. Step 4: Simplify right side
   1,921.68x = 3,158,376.02
5. Step 5: Solve for x
   x = 3,158,376.02/1,921.68
6. Step 6: Final answer
   x = 1,643.55