Finding the Fourth Proportional to 9,107.02, 12,567.64 and 5,128.17

Step by Step Solution

1. Step 1: Write the proportion equation
   9,107.02 : 12,567.64 = 5,128.17 : x
2. Step 2: Convert to fraction form
   9,107.02/12,567.64 = 5,128.17/x
3. Step 3: Cross multiply
   9,107.02x = 12,567.64 × 5,128.17
4. Step 4: Simplify right side
   9,107.02x = 64,448,994.42
5. Step 5: Solve for x
   x = 64,448,994.42/9,107.02
6. Step 6: Final answer
   x = 7,076.85