Finding the Fourth Proportional to 12,784.58, 17,638.04 and 7,745.17

Step by Step Solution

1. Step 1: Write the proportion equation
   12,784.58 : 17,638.04 = 7,745.17 : x
2. Step 2: Convert to fraction form
   12,784.58/17,638.04 = 7,745.17/x
3. Step 3: Cross multiply
   12,784.58x = 17,638.04 × 7,745.17
4. Step 4: Simplify right side
   12,784.58x = 136,609,535.45
5. Step 5: Solve for x
   x = 136,609,535.45/12,784.58
6. Step 6: Final answer
   x = 10,685.49