Finding the Fourth Proportional to 9,990.81, 14,981.95 and 3,746.50

Step by Step Solution

1. Step 1: Write the proportion equation
   9,990.81 : 14,981.95 = 3,746.50 : x
2. Step 2: Convert to fraction form
   9,990.81/14,981.95 = 3,746.50/x
3. Step 3: Cross multiply
   9,990.81x = 14,981.95 × 3,746.50
4. Step 4: Simplify right side
   9,990.81x = 56,129,906.10
5. Step 5: Solve for x
   x = 56,129,906.10/9,990.81
6. Step 6: Final answer
   x = 5,618.15