Finding the Fourth Proportional to 9,983.72, 14,978.82 and 4,790

Step by Step Solution

1. Step 1: Write the proportion equation
   9,983.72 : 14,978.82 = 4,790 : x
2. Step 2: Convert to fraction form
   9,983.72/14,978.82 = 4,790/x
3. Step 3: Cross multiply
   9,983.72x = 14,978.82 × 4,790
4. Step 4: Simplify right side
   9,983.72x = 71,748,547.80
5. Step 5: Solve for x
   x = 71,748,547.80/9,983.72
6. Step 6: Final answer
   x = 7,186.55