Finding the Fourth Proportional to 1,914.72, 2,642.11 and 1,285.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,914.72 : 2,642.11 = 1,285.12 : x
2. Step 2: Convert to fraction form
   1,914.72/2,642.11 = 1,285.12/x
3. Step 3: Cross multiply
   1,914.72x = 2,642.11 × 1,285.12
4. Step 4: Simplify right side
   1,914.72x = 3,395,428.40
5. Step 5: Solve for x
   x = 3,395,428.40/1,914.72
6. Step 6: Final answer
   x = 1,773.33