Finding the Fourth Proportional to 11,889.30, 17,819.90 and 4,864.98

Step by Step Solution

1. Step 1: Write the proportion equation
   11,889.30 : 17,819.90 = 4,864.98 : x
2. Step 2: Convert to fraction form
   11,889.30/17,819.90 = 4,864.98/x
3. Step 3: Cross multiply
   11,889.30x = 17,819.90 × 4,864.98
4. Step 4: Simplify right side
   11,889.30x = 86,693,457.10
5. Step 5: Solve for x
   x = 86,693,457.10/11,889.30
6. Step 6: Final answer
   x = 7,291.72