Finding the Fourth Proportional to 9,988.65, 14,978.82 and 2,966.15

Step by Step Solution

1. Step 1: Write the proportion equation
   9,988.65 : 14,978.82 = 2,966.15 : x
2. Step 2: Convert to fraction form
   9,988.65/14,978.82 = 2,966.15/x
3. Step 3: Cross multiply
   9,988.65x = 14,978.82 × 2,966.15
4. Step 4: Simplify right side
   9,988.65x = 44,429,475.51
5. Step 5: Solve for x
   x = 44,429,475.51/9,988.65
6. Step 6: Final answer
   x = 4,448.00