Finding the Fourth Proportional to 9,663.63, 13,336.89 and 5,415.38

Step by Step Solution

1. Step 1: Write the proportion equation
   9,663.63 : 13,336.89 = 5,415.38 : x
2. Step 2: Convert to fraction form
   9,663.63/13,336.89 = 5,415.38/x
3. Step 3: Cross multiply
   9,663.63x = 13,336.89 × 5,415.38
4. Step 4: Simplify right side
   9,663.63x = 72,224,300.29
5. Step 5: Solve for x
   x = 72,224,300.29/9,663.63
6. Step 6: Final answer
   x = 7,473.83