Finding the Fourth Proportional to 13,196.86, 19,789.11 and 7,651.78

Step by Step Solution

1. Step 1: Write the proportion equation
   13,196.86 : 19,789.11 = 7,651.78 : x
2. Step 2: Convert to fraction form
   13,196.86/19,789.11 = 7,651.78/x
3. Step 3: Cross multiply
   13,196.86x = 19,789.11 × 7,651.78
4. Step 4: Simplify right side
   13,196.86x = 151,421,916.12
5. Step 5: Solve for x
   x = 151,421,916.12/13,196.86
6. Step 6: Final answer
   x = 11,474.09