Finding the Fourth Proportional to 1,992.84, 2,748.90 and 1,434.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,992.84 : 2,748.90 = 1,434.06 : x
2. Step 2: Convert to fraction form
   1,992.84/2,748.90 = 1,434.06/x
3. Step 3: Cross multiply
   1,992.84x = 2,748.90 × 1,434.06
4. Step 4: Simplify right side
   1,992.84x = 3,942,087.53
5. Step 5: Solve for x
   x = 3,942,087.53/1,992.84
6. Step 6: Final answer
   x = 1,978.13