Finding the Fourth Proportional to 12,612.45, 17,389.76 and 7,888.53

Step by Step Solution

1. Step 1: Write the proportion equation
   12,612.45 : 17,389.76 = 7,888.53 : x
2. Step 2: Convert to fraction form
   12,612.45/17,389.76 = 7,888.53/x
3. Step 3: Cross multiply
   12,612.45x = 17,389.76 × 7,888.53
4. Step 4: Simplify right side
   12,612.45x = 137,179,643.45
5. Step 5: Solve for x
   x = 137,179,643.45/12,612.45
6. Step 6: Final answer
   x = 10,876.53