Finding the Fourth Proportional to 13,245.59, 19,863.29 and 5,642.06

Step by Step Solution

1. Step 1: Write the proportion equation
   13,245.59 : 19,863.29 = 5,642.06 : x
2. Step 2: Convert to fraction form
   13,245.59/19,863.29 = 5,642.06/x
3. Step 3: Cross multiply
   13,245.59x = 19,863.29 × 5,642.06
4. Step 4: Simplify right side
   13,245.59x = 112,069,788.77
5. Step 5: Solve for x
   x = 112,069,788.77/13,245.59
6. Step 6: Final answer
   x = 8,460.91