Finding the Fourth Proportional to 1,942.34, 2,916.41 and 1,122.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,942.34 : 2,916.41 = 1,122.21 : x
2. Step 2: Convert to fraction form
   1,942.34/2,916.41 = 1,122.21/x
3. Step 3: Cross multiply
   1,942.34x = 2,916.41 × 1,122.21
4. Step 4: Simplify right side
   1,942.34x = 3,272,818.86
5. Step 5: Solve for x
   x = 3,272,818.86/1,942.34
6. Step 6: Final answer
   x = 1,684.99