Finding the Fourth Proportional to 9,131.79, 12,601.67 and 5,152.80

Step by Step Solution

1. Step 1: Write the proportion equation
   9,131.79 : 12,601.67 = 5,152.80 : x
2. Step 2: Convert to fraction form
   9,131.79/12,601.67 = 5,152.80/x
3. Step 3: Cross multiply
   9,131.79x = 12,601.67 × 5,152.80
4. Step 4: Simplify right side
   9,131.79x = 64,933,859.41
5. Step 5: Solve for x
   x = 64,933,859.41/9,131.79
6. Step 6: Final answer
   x = 7,110.75