Finding the Fourth Proportional to 9,164.75, 12,646.28 and 5,131.80

Step by Step Solution

1. Step 1: Write the proportion equation
   9,164.75 : 12,646.28 = 5,131.80 : x
2. Step 2: Convert to fraction form
   9,164.75/12,646.28 = 5,131.80/x
3. Step 3: Cross multiply
   9,164.75x = 12,646.28 × 5,131.80
4. Step 4: Simplify right side
   9,164.75x = 64,898,192.53
5. Step 5: Solve for x
   x = 64,898,192.53/9,164.75
6. Step 6: Final answer
   x = 7,081.29