Finding the Fourth Proportional to 13,111.07, 19,666.53 and 5,613.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,111.07 : 19,666.53 = 5,613.50 : x
2. Step 2: Convert to fraction form
   13,111.07/19,666.53 = 5,613.50/x
3. Step 3: Cross multiply
   13,111.07x = 19,666.53 × 5,613.50
4. Step 4: Simplify right side
   13,111.07x = 110,398,115.32
5. Step 5: Solve for x
   x = 110,398,115.32/13,111.07
6. Step 6: Final answer
   x = 8,420.22