Finding the Fourth Proportional to 12,388.51, 17,079.28 and 8,845.57

Step by Step Solution

1. Step 1: Write the proportion equation
   12,388.51 : 17,079.28 = 8,845.57 : x
2. Step 2: Convert to fraction form
   12,388.51/17,079.28 = 8,845.57/x
3. Step 3: Cross multiply
   12,388.51x = 17,079.28 × 8,845.57
4. Step 4: Simplify right side
   12,388.51x = 151,075,966.79
5. Step 5: Solve for x
   x = 151,075,966.79/12,388.51
6. Step 6: Final answer
   x = 12,194.85