Finding the Fourth Proportional to 10,518.53, 15,777.68 and 3,123.05

Step by Step Solution

1. Step 1: Write the proportion equation
   10,518.53 : 15,777.68 = 3,123.05 : x
2. Step 2: Convert to fraction form
   10,518.53/15,777.68 = 3,123.05/x
3. Step 3: Cross multiply
   10,518.53x = 15,777.68 × 3,123.05
4. Step 4: Simplify right side
   10,518.53x = 49,274,389.02
5. Step 5: Solve for x
   x = 49,274,389.02/10,518.53
6. Step 6: Final answer
   x = 4,684.53