Finding the Fourth Proportional to 2,091.67, 3,138.38 and 1,051.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,091.67 : 3,138.38 = 1,051.12 : x
2. Step 2: Convert to fraction form
   2,091.67/3,138.38 = 1,051.12/x
3. Step 3: Cross multiply
   2,091.67x = 3,138.38 × 1,051.12
4. Step 4: Simplify right side
   2,091.67x = 3,298,813.99
5. Step 5: Solve for x
   x = 3,298,813.99/2,091.67
6. Step 6: Final answer
   x = 1,577.12