Finding the Fourth Proportional to 13,111.45, 19,566.38 and 13,036.57

Step by Step Solution

1. Step 1: Write the proportion equation
   13,111.45 : 19,566.38 = 13,036.57 : x
2. Step 2: Convert to fraction form
   13,111.45/19,566.38 = 13,036.57/x
3. Step 3: Cross multiply
   13,111.45x = 19,566.38 × 13,036.57
4. Step 4: Simplify right side
   13,111.45x = 255,078,482.52
5. Step 5: Solve for x
   x = 255,078,482.52/13,111.45
6. Step 6: Final answer
   x = 19,454.64