Finding the Fourth Proportional to 9,989.81, 14,980.81 and 3,746.42

Step by Step Solution

1. Step 1: Write the proportion equation
   9,989.81 : 14,980.81 = 3,746.42 : x
2. Step 2: Convert to fraction form
   9,989.81/14,980.81 = 3,746.42/x
3. Step 3: Cross multiply
   9,989.81x = 14,980.81 × 3,746.42
4. Step 4: Simplify right side
   9,989.81x = 56,124,406.20
5. Step 5: Solve for x
   x = 56,124,406.20/9,989.81
6. Step 6: Final answer
   x = 5,618.17