Finding the Fourth Proportional to 13,336.35, 19,997.69 and 7,800.51

Step by Step Solution

1. Step 1: Write the proportion equation
   13,336.35 : 19,997.69 = 7,800.51 : x
2. Step 2: Convert to fraction form
   13,336.35/19,997.69 = 7,800.51/x
3. Step 3: Cross multiply
   13,336.35x = 19,997.69 × 7,800.51
4. Step 4: Simplify right side
   13,336.35x = 155,992,141.82
5. Step 5: Solve for x
   x = 155,992,141.82/13,336.35
6. Step 6: Final answer
   x = 11,696.76