Finding the Fourth Proportional to 21,898.54, 32,832.82 and 7,858.25

Step by Step Solution

1. Step 1: Write the proportion equation
   21,898.54 : 32,832.82 = 7,858.25 : x
2. Step 2: Convert to fraction form
   21,898.54/32,832.82 = 7,858.25/x
3. Step 3: Cross multiply
   21,898.54x = 32,832.82 × 7,858.25
4. Step 4: Simplify right side
   21,898.54x = 258,008,507.77
5. Step 5: Solve for x
   x = 258,008,507.77/21,898.54
6. Step 6: Final answer
   x = 11,782.00