Finding the Fourth Proportional to 9,665.55, 13,337.82 and 5,415.93

Step by Step Solution

1. Step 1: Write the proportion equation
   9,665.55 : 13,337.82 = 5,415.93 : x
2. Step 2: Convert to fraction form
   9,665.55/13,337.82 = 5,415.93/x
3. Step 3: Cross multiply
   9,665.55x = 13,337.82 × 5,415.93
4. Step 4: Simplify right side
   9,665.55x = 72,236,699.47
5. Step 5: Solve for x
   x = 72,236,699.47/9,665.55
6. Step 6: Final answer
   x = 7,473.63