Finding the Fourth Proportional to 21,570.88, 32,368.72 and 11,711

Step by Step Solution

1. Step 1: Write the proportion equation
   21,570.88 : 32,368.72 = 11,711 : x
2. Step 2: Convert to fraction form
   21,570.88/32,368.72 = 11,711/x
3. Step 3: Cross multiply
   21,570.88x = 32,368.72 × 11,711
4. Step 4: Simplify right side
   21,570.88x = 379,070,079.92
5. Step 5: Solve for x
   x = 379,070,079.92/21,570.88
6. Step 6: Final answer
   x = 17,573.23