Finding the Fourth Proportional to 5,113.54, 7,056.61 and 2,990.53

Step by Step Solution

1. Step 1: Write the proportion equation
   5,113.54 : 7,056.61 = 2,990.53 : x
2. Step 2: Convert to fraction form
   5,113.54/7,056.61 = 2,990.53/x
3. Step 3: Cross multiply
   5,113.54x = 7,056.61 × 2,990.53
4. Step 4: Simplify right side
   5,113.54x = 21,103,003.90
5. Step 5: Solve for x
   x = 21,103,003.90/5,113.54
6. Step 6: Final answer
   x = 4,126.89