Finding the Fourth Proportional to 2,142.77, 3,213.18 and 843.93

Step by Step Solution

1. Step 1: Write the proportion equation
   2,142.77 : 3,213.18 = 843.93 : x
2. Step 2: Convert to fraction form
   2,142.77/3,213.18 = 843.93/x
3. Step 3: Cross multiply
   2,142.77x = 3,213.18 × 843.93
4. Step 4: Simplify right side
   2,142.77x = 2,711,699.00
5. Step 5: Solve for x
   x = 2,711,699.00/2,142.77
6. Step 6: Final answer
   x = 1,265.51