Finding the Fourth Proportional to 12,833.60, 17,710.47 and 7,528.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,833.60 : 17,710.47 = 7,528.50 : x
2. Step 2: Convert to fraction form
   12,833.60/17,710.47 = 7,528.50/x
3. Step 3: Cross multiply
   12,833.60x = 17,710.47 × 7,528.50
4. Step 4: Simplify right side
   12,833.60x = 133,333,273.40
5. Step 5: Solve for x
   x = 133,333,273.40/12,833.60
6. Step 6: Final answer
   x = 10,389.39