Finding the Fourth Proportional to 13,320.16, 18,377.76 and 7,730.08

Step by Step Solution

1. Step 1: Write the proportion equation
   13,320.16 : 18,377.76 = 7,730.08 : x
2. Step 2: Convert to fraction form
   13,320.16/18,377.76 = 7,730.08/x
3. Step 3: Cross multiply
   13,320.16x = 18,377.76 × 7,730.08
4. Step 4: Simplify right side
   13,320.16x = 142,061,555.02
5. Step 5: Solve for x
   x = 142,061,555.02/13,320.16
6. Step 6: Final answer
   x = 10,665.15