Finding the Fourth Proportional to 21,872.61, 32,802.03 and 7,078.10

Step by Step Solution

1. Step 1: Write the proportion equation
   21,872.61 : 32,802.03 = 7,078.10 : x
2. Step 2: Convert to fraction form
   21,872.61/32,802.03 = 7,078.10/x
3. Step 3: Cross multiply
   21,872.61x = 32,802.03 × 7,078.10
4. Step 4: Simplify right side
   21,872.61x = 232,175,884.53
5. Step 5: Solve for x
   x = 232,175,884.53/21,872.61
6. Step 6: Final answer
   x = 10,614.91