Finding the Fourth Proportional to 12,499.44, 18,778.32 and 7,308.96

Step by Step Solution

1. Step 1: Write the proportion equation
   12,499.44 : 18,778.32 = 7,308.96 : x
2. Step 2: Convert to fraction form
   12,499.44/18,778.32 = 7,308.96/x
3. Step 3: Cross multiply
   12,499.44x = 18,778.32 × 7,308.96
4. Step 4: Simplify right side
   12,499.44x = 137,249,989.75
5. Step 5: Solve for x
   x = 137,249,989.75/12,499.44
6. Step 6: Final answer
   x = 10,980.49