Finding the Fourth Proportional to 9,678.90, 14,523.81 and 4,131.72

Step by Step Solution

1. Step 1: Write the proportion equation
   9,678.90 : 14,523.81 = 4,131.72 : x
2. Step 2: Convert to fraction form
   9,678.90/14,523.81 = 4,131.72/x
3. Step 3: Cross multiply
   9,678.90x = 14,523.81 × 4,131.72
4. Step 4: Simplify right side
   9,678.90x = 60,008,316.25
5. Step 5: Solve for x
   x = 60,008,316.25/9,678.90
6. Step 6: Final answer
   x = 6,199.91