Finding the Fourth Proportional to 2,191.34, 3,022.80 and 1,307.08

Step by Step Solution

1. Step 1: Write the proportion equation
   2,191.34 : 3,022.80 = 1,307.08 : x
2. Step 2: Convert to fraction form
   2,191.34/3,022.80 = 1,307.08/x
3. Step 3: Cross multiply
   2,191.34x = 3,022.80 × 1,307.08
4. Step 4: Simplify right side
   2,191.34x = 3,951,041.42
5. Step 5: Solve for x
   x = 3,951,041.42/2,191.34
6. Step 6: Final answer
   x = 1,803.03