Finding the Fourth Proportional to 12,908.50, 17,813.93 and 7,530.79

Step by Step Solution

1. Step 1: Write the proportion equation
   12,908.50 : 17,813.93 = 7,530.79 : x
2. Step 2: Convert to fraction form
   12,908.50/17,813.93 = 7,530.79/x
3. Step 3: Cross multiply
   12,908.50x = 17,813.93 × 7,530.79
4. Step 4: Simplify right side
   12,908.50x = 134,152,928.25
5. Step 5: Solve for x
   x = 134,152,928.25/12,908.50
6. Step 6: Final answer
   x = 10,392.60