Finding the Fourth Proportional to 13,196.61, 19,789.11 and 7,653.78

Step by Step Solution

1. Step 1: Write the proportion equation
   13,196.61 : 19,789.11 = 7,653.78 : x
2. Step 2: Convert to fraction form
   13,196.61/19,789.11 = 7,653.78/x
3. Step 3: Cross multiply
   13,196.61x = 19,789.11 × 7,653.78
4. Step 4: Simplify right side
   13,196.61x = 151,461,494.34
5. Step 5: Solve for x
   x = 151,461,494.34/13,196.61
6. Step 6: Final answer
   x = 11,477.30