Finding the Fourth Proportional to 21,300.30, 29,394.54 and 12,353.11

Step by Step Solution

1. Step 1: Write the proportion equation
   21,300.30 : 29,394.54 = 12,353.11 : x
2. Step 2: Convert to fraction form
   21,300.30/29,394.54 = 12,353.11/x
3. Step 3: Cross multiply
   21,300.30x = 29,394.54 × 12,353.11
4. Step 4: Simplify right side
   21,300.30x = 363,113,924.25
5. Step 5: Solve for x
   x = 363,113,924.25/21,300.30
6. Step 6: Final answer
   x = 17,047.36