Finding the Fourth Proportional to 9,889.61, 14,835.71 and 3,653.99

Step by Step Solution

1. Step 1: Write the proportion equation
   9,889.61 : 14,835.71 = 3,653.99 : x
2. Step 2: Convert to fraction form
   9,889.61/14,835.71 = 3,653.99/x
3. Step 3: Cross multiply
   9,889.61x = 14,835.71 × 3,653.99
4. Step 4: Simplify right side
   9,889.61x = 54,209,535.98
5. Step 5: Solve for x
   x = 54,209,535.98/9,889.61
6. Step 6: Final answer
   x = 5,481.46