Finding the Fourth Proportional to 9,910.55, 13,677.42 and 5,435.16

Step by Step Solution

1. Step 1: Write the proportion equation
   9,910.55 : 13,677.42 = 5,435.16 : x
2. Step 2: Convert to fraction form
   9,910.55/13,677.42 = 5,435.16/x
3. Step 3: Cross multiply
   9,910.55x = 13,677.42 × 5,435.16
4. Step 4: Simplify right side
   9,910.55x = 74,338,966.09
5. Step 5: Solve for x
   x = 74,338,966.09/9,910.55
6. Step 6: Final answer
   x = 7,500.99