Finding the Fourth Proportional to 12,436.01, 18,641.54 and 5,777.19

Step by Step Solution

1. Step 1: Write the proportion equation
   12,436.01 : 18,641.54 = 5,777.19 : x
2. Step 2: Convert to fraction form
   12,436.01/18,641.54 = 5,777.19/x
3. Step 3: Cross multiply
   12,436.01x = 18,641.54 × 5,777.19
4. Step 4: Simplify right side
   12,436.01x = 107,695,662.40
5. Step 5: Solve for x
   x = 107,695,662.40/12,436.01
6. Step 6: Final answer
   x = 8,659.99