Finding the Fourth Proportional to 8,699.86, 12,003.96 and 5,164.22

Step by Step Solution

1. Step 1: Write the proportion equation
   8,699.86 : 12,003.96 = 5,164.22 : x
2. Step 2: Convert to fraction form
   8,699.86/12,003.96 = 5,164.22/x
3. Step 3: Cross multiply
   8,699.86x = 12,003.96 × 5,164.22
4. Step 4: Simplify right side
   8,699.86x = 61,991,090.31
5. Step 5: Solve for x
   x = 61,991,090.31/8,699.86
6. Step 6: Final answer
   x = 7,125.53