Finding the Fourth Proportional to 2,088.79, 3,134.45 and 1,213

Step by Step Solution

1. Step 1: Write the proportion equation
   2,088.79 : 3,134.45 = 1,213 : x
2. Step 2: Convert to fraction form
   2,088.79/3,134.45 = 1,213/x
3. Step 3: Cross multiply
   2,088.79x = 3,134.45 × 1,213
4. Step 4: Simplify right side
   2,088.79x = 3,802,087.85
5. Step 5: Solve for x
   x = 3,802,087.85/2,088.79
6. Step 6: Final answer
   x = 1,820.23