Finding the Fourth Proportional to 1,485.84, 2,233.82 and 1,213.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,485.84 : 2,233.82 = 1,213.91 : x
2. Step 2: Convert to fraction form
   1,485.84/2,233.82 = 1,213.91/x
3. Step 3: Cross multiply
   1,485.84x = 2,233.82 × 1,213.91
4. Step 4: Simplify right side
   1,485.84x = 2,711,645.27
5. Step 5: Solve for x
   x = 2,711,645.27/1,485.84
6. Step 6: Final answer
   x = 1,824.99