Finding the Fourth Proportional to 21,931.26, 32,900.31 and 7,136.71

Step by Step Solution

1. Step 1: Write the proportion equation
   21,931.26 : 32,900.31 = 7,136.71 : x
2. Step 2: Convert to fraction form
   21,931.26/32,900.31 = 7,136.71/x
3. Step 3: Cross multiply
   21,931.26x = 32,900.31 × 7,136.71
4. Step 4: Simplify right side
   21,931.26x = 234,799,889.13
5. Step 5: Solve for x
   x = 234,799,889.13/21,931.26
6. Step 6: Final answer
   x = 10,706.18