Finding the Fourth Proportional to 2,385.23, 3,577.33 and 1,213.99

Step by Step Solution

1. Step 1: Write the proportion equation
   2,385.23 : 3,577.33 = 1,213.99 : x
2. Step 2: Convert to fraction form
   2,385.23/3,577.33 = 1,213.99/x
3. Step 3: Cross multiply
   2,385.23x = 3,577.33 × 1,213.99
4. Step 4: Simplify right side
   2,385.23x = 4,342,836.78
5. Step 5: Solve for x
   x = 4,342,836.78/2,385.23
6. Step 6: Final answer
   x = 1,820.72