Finding the Fourth Proportional to 12,773.89, 19,151.29 and 8,813.85

Step by Step Solution

1. Step 1: Write the proportion equation
   12,773.89 : 19,151.29 = 8,813.85 : x
2. Step 2: Convert to fraction form
   12,773.89/19,151.29 = 8,813.85/x
3. Step 3: Cross multiply
   12,773.89x = 19,151.29 × 8,813.85
4. Step 4: Simplify right side
   12,773.89x = 168,796,597.37
5. Step 5: Solve for x
   x = 168,796,597.37/12,773.89
6. Step 6: Final answer
   x = 13,214.19