Finding the Fourth Proportional to 21,678.10, 32,526.52 and 7,648.14

Step by Step Solution

1. Step 1: Write the proportion equation
   21,678.10 : 32,526.52 = 7,648.14 : x
2. Step 2: Convert to fraction form
   21,678.10/32,526.52 = 7,648.14/x
3. Step 3: Cross multiply
   21,678.10x = 32,526.52 × 7,648.14
4. Step 4: Simplify right side
   21,678.10x = 248,767,378.67
5. Step 5: Solve for x
   x = 248,767,378.67/21,678.10
6. Step 6: Final answer
   x = 11,475.52