Finding the Fourth Proportional to 12,889.84, 17,878.29 and 12,364.96

Step by Step Solution

1. Step 1: Write the proportion equation
   12,889.84 : 17,878.29 = 12,364.96 : x
2. Step 2: Convert to fraction form
   12,889.84/17,878.29 = 12,364.96/x
3. Step 3: Cross multiply
   12,889.84x = 17,878.29 × 12,364.96
4. Step 4: Simplify right side
   12,889.84x = 221,064,340.72
5. Step 5: Solve for x
   x = 221,064,340.72/12,889.84
6. Step 6: Final answer
   x = 17,150.28