Finding the Fourth Proportional to 9,911.89, 14,866.40 and 2,890.01

Step by Step Solution

1. Step 1: Write the proportion equation
   9,911.89 : 14,866.40 = 2,890.01 : x
2. Step 2: Convert to fraction form
   9,911.89/14,866.40 = 2,890.01/x
3. Step 3: Cross multiply
   9,911.89x = 14,866.40 × 2,890.01
4. Step 4: Simplify right side
   9,911.89x = 42,964,089.06
5. Step 5: Solve for x
   x = 42,964,089.06/9,911.89
6. Step 6: Final answer
   x = 4,334.60