Finding the Fourth Proportional to 12,961.50, 19,458.59 and 11,026.01

Step by Step Solution

1. Step 1: Write the proportion equation
   12,961.50 : 19,458.59 = 11,026.01 : x
2. Step 2: Convert to fraction form
   12,961.50/19,458.59 = 11,026.01/x
3. Step 3: Cross multiply
   12,961.50x = 19,458.59 × 11,026.01
4. Step 4: Simplify right side
   12,961.50x = 214,550,455.50
5. Step 5: Solve for x
   x = 214,550,455.50/12,961.50
6. Step 6: Final answer
   x = 16,552.90