Finding the Fourth Proportional to 9,991.68, 14,995.20 and 3,756.30

Step by Step Solution

1. Step 1: Write the proportion equation
   9,991.68 : 14,995.20 = 3,756.30 : x
2. Step 2: Convert to fraction form
   9,991.68/14,995.20 = 3,756.30/x
3. Step 3: Cross multiply
   9,991.68x = 14,995.20 × 3,756.30
4. Step 4: Simplify right side
   9,991.68x = 56,326,469.76
5. Step 5: Solve for x
   x = 56,326,469.76/9,991.68
6. Step 6: Final answer
   x = 5,637.34