Finding the Fourth Proportional to 12,146.33, 16,772.91 and 7,678.01

Step by Step Solution

1. Step 1: Write the proportion equation
   12,146.33 : 16,772.91 = 7,678.01 : x
2. Step 2: Convert to fraction form
   12,146.33/16,772.91 = 7,678.01/x
3. Step 3: Cross multiply
   12,146.33x = 16,772.91 × 7,678.01
4. Step 4: Simplify right side
   12,146.33x = 128,782,570.71
5. Step 5: Solve for x
   x = 128,782,570.71/12,146.33
6. Step 6: Final answer
   x = 10,602.59