Finding the Fourth Proportional to 10,113.12, 13,956.59 and 5,636.91

Step by Step Solution

1. Step 1: Write the proportion equation
   10,113.12 : 13,956.59 = 5,636.91 : x
2. Step 2: Convert to fraction form
   10,113.12/13,956.59 = 5,636.91/x
3. Step 3: Cross multiply
   10,113.12x = 13,956.59 × 5,636.91
4. Step 4: Simplify right side
   10,113.12x = 78,672,019.09
5. Step 5: Solve for x
   x = 78,672,019.09/10,113.12
6. Step 6: Final answer
   x = 7,779.20