Finding the Fourth Proportional to 11,777.19, 17,665.89 and 3,457.35

Step by Step Solution

1. Step 1: Write the proportion equation
   11,777.19 : 17,665.89 = 3,457.35 : x
2. Step 2: Convert to fraction form
   11,777.19/17,665.89 = 3,457.35/x
3. Step 3: Cross multiply
   11,777.19x = 17,665.89 × 3,457.35
4. Step 4: Simplify right side
   11,777.19x = 61,077,164.79
5. Step 5: Solve for x
   x = 61,077,164.79/11,777.19
6. Step 6: Final answer
   x = 5,186.06