Finding the Fourth Proportional to 2,111.99, 2,915.72 and 1,404.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.99 : 2,915.72 = 1,404.38 : x
2. Step 2: Convert to fraction form
   2,111.99/2,915.72 = 1,404.38/x
3. Step 3: Cross multiply
   2,111.99x = 2,915.72 × 1,404.38
4. Step 4: Simplify right side
   2,111.99x = 4,094,768.17
5. Step 5: Solve for x
   x = 4,094,768.17/2,111.99
6. Step 6: Final answer
   x = 1,938.82