Finding the Fourth Proportional to 21,463.10, 29,602.35 and 12,956.34

Step by Step Solution

1. Step 1: Write the proportion equation
   21,463.10 : 29,602.35 = 12,956.34 : x
2. Step 2: Convert to fraction form
   21,463.10/29,602.35 = 12,956.34/x
3. Step 3: Cross multiply
   21,463.10x = 29,602.35 × 12,956.34
4. Step 4: Simplify right side
   21,463.10x = 383,538,111.40
5. Step 5: Solve for x
   x = 383,538,111.40/21,463.10
6. Step 6: Final answer
   x = 17,869.66