Finding the Fourth Proportional to 5,577.45, 8,368.59 and 2,113.89

Step by Step Solution

1. Step 1: Write the proportion equation
   5,577.45 : 8,368.59 = 2,113.89 : x
2. Step 2: Convert to fraction form
   5,577.45/8,368.59 = 2,113.89/x
3. Step 3: Cross multiply
   5,577.45x = 8,368.59 × 2,113.89
4. Step 4: Simplify right side
   5,577.45x = 17,690,278.72
5. Step 5: Solve for x
   x = 17,690,278.72/5,577.45
6. Step 6: Final answer
   x = 3,171.75