Finding the Fourth Proportional to 16,901.88, 23,312.52 and 12,916.12

Step by Step Solution

1. Step 1: Write the proportion equation
   16,901.88 : 23,312.52 = 12,916.12 : x
2. Step 2: Convert to fraction form
   16,901.88/23,312.52 = 12,916.12/x
3. Step 3: Cross multiply
   16,901.88x = 23,312.52 × 12,916.12
4. Step 4: Simplify right side
   16,901.88x = 301,107,305.82
5. Step 5: Solve for x
   x = 301,107,305.82/16,901.88
6. Step 6: Final answer
   x = 17,815.02