Finding the Fourth Proportional to 1,427.45, 1,968.18 and 1,191.74

Step by Step Solution

1. Step 1: Write the proportion equation
   1,427.45 : 1,968.18 = 1,191.74 : x
2. Step 2: Convert to fraction form
   1,427.45/1,968.18 = 1,191.74/x
3. Step 3: Cross multiply
   1,427.45x = 1,968.18 × 1,191.74
4. Step 4: Simplify right side
   1,427.45x = 2,345,558.83
5. Step 5: Solve for x
   x = 2,345,558.83/1,427.45
6. Step 6: Final answer
   x = 1,643.18