Finding the Fourth Proportional to 21,151.21, 29,191.72 and 12,196.93

Step by Step Solution

1. Step 1: Write the proportion equation
   21,151.21 : 29,191.72 = 12,196.93 : x
2. Step 2: Convert to fraction form
   21,151.21/29,191.72 = 12,196.93/x
3. Step 3: Cross multiply
   21,151.21x = 29,191.72 × 12,196.93
4. Step 4: Simplify right side
   21,151.21x = 356,049,219.46
5. Step 5: Solve for x
   x = 356,049,219.46/21,151.21
6. Step 6: Final answer
   x = 16,833.52