Finding the Fourth Proportional to 12,597.56, 17,388.62 and 7,878.84

Step by Step Solution

1. Step 1: Write the proportion equation
   12,597.56 : 17,388.62 = 7,878.84 : x
2. Step 2: Convert to fraction form
   12,597.56/17,388.62 = 7,878.84/x
3. Step 3: Cross multiply
   12,597.56x = 17,388.62 × 7,878.84
4. Step 4: Simplify right side
   12,597.56x = 137,002,154.80
5. Step 5: Solve for x
   x = 137,002,154.80/12,597.56
6. Step 6: Final answer
   x = 10,875.29