Finding the Fourth Proportional to 2,118.74, 3,177.57 and 948.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,118.74 : 3,177.57 = 948.09 : x
2. Step 2: Convert to fraction form
   2,118.74/3,177.57 = 948.09/x
3. Step 3: Cross multiply
   2,118.74x = 3,177.57 × 948.09
4. Step 4: Simplify right side
   2,118.74x = 3,012,622.34
5. Step 5: Solve for x
   x = 3,012,622.34/2,118.74
6. Step 6: Final answer
   x = 1,421.89