Finding the Fourth Proportional to 9,410.12, 12,985.45 and 5,376.80

Step by Step Solution

1. Step 1: Write the proportion equation
   9,410.12 : 12,985.45 = 5,376.80 : x
2. Step 2: Convert to fraction form
   9,410.12/12,985.45 = 5,376.80/x
3. Step 3: Cross multiply
   9,410.12x = 12,985.45 × 5,376.80
4. Step 4: Simplify right side
   9,410.12x = 69,820,075.75
5. Step 5: Solve for x
   x = 69,820,075.75/9,410.12
6. Step 6: Final answer
   x = 7,419.68