Finding the Fourth Proportional to 12,388.95, 17,100.09 and 7,670.61

Step by Step Solution

1. Step 1: Write the proportion equation
   12,388.95 : 17,100.09 = 7,670.61 : x
2. Step 2: Convert to fraction form
   12,388.95/17,100.09 = 7,670.61/x
3. Step 3: Cross multiply
   12,388.95x = 17,100.09 × 7,670.61
4. Step 4: Simplify right side
   12,388.95x = 131,168,121.35
5. Step 5: Solve for x
   x = 131,168,121.35/12,388.95
6. Step 6: Final answer
   x = 10,587.51