Finding the Fourth Proportional to 1,914.93, 2,874.15 and 991.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,914.93 : 2,874.15 = 991.05 : x
2. Step 2: Convert to fraction form
   1,914.93/2,874.15 = 991.05/x
3. Step 3: Cross multiply
   1,914.93x = 2,874.15 × 991.05
4. Step 4: Simplify right side
   1,914.93x = 2,848,426.36
5. Step 5: Solve for x
   x = 2,848,426.36/1,914.93
6. Step 6: Final answer
   x = 1,487.48