Finding the Fourth Proportional to 12,977.05, 17,910.61 and 12,385.40

Step by Step Solution

1. Step 1: Write the proportion equation
   12,977.05 : 17,910.61 = 12,385.40 : x
2. Step 2: Convert to fraction form
   12,977.05/17,910.61 = 12,385.40/x
3. Step 3: Cross multiply
   12,977.05x = 17,910.61 × 12,385.40
4. Step 4: Simplify right side
   12,977.05x = 221,830,007.17
5. Step 5: Solve for x
   x = 221,830,007.17/12,977.05
6. Step 6: Final answer
   x = 17,094.03