Finding the Fourth Proportional to 9,415.08, 12,994.53 and 5,436.54

Step by Step Solution

1. Step 1: Write the proportion equation
   9,415.08 : 12,994.53 = 5,436.54 : x
2. Step 2: Convert to fraction form
   9,415.08/12,994.53 = 5,436.54/x
3. Step 3: Cross multiply
   9,415.08x = 12,994.53 × 5,436.54
4. Step 4: Simplify right side
   9,415.08x = 70,645,282.13
5. Step 5: Solve for x
   x = 70,645,282.13/9,415.08
6. Step 6: Final answer
   x = 7,503.42