Finding the Fourth Proportional to 9,412.59, 12,985.86 and 7,528.53

Step by Step Solution

1. Step 1: Write the proportion equation
   9,412.59 : 12,985.86 = 7,528.53 : x
2. Step 2: Convert to fraction form
   9,412.59/12,985.86 = 7,528.53/x
3. Step 3: Cross multiply
   9,412.59x = 12,985.86 × 7,528.53
4. Step 4: Simplify right side
   9,412.59x = 97,764,436.59
5. Step 5: Solve for x
   x = 97,764,436.59/9,412.59
6. Step 6: Final answer
   x = 10,386.56