Finding the Fourth Proportional to 11,208.51, 16,814.61 and 3,415.50

Step by Step Solution

1. Step 1: Write the proportion equation
   11,208.51 : 16,814.61 = 3,415.50 : x
2. Step 2: Convert to fraction form
   11,208.51/16,814.61 = 3,415.50/x
3. Step 3: Cross multiply
   11,208.51x = 16,814.61 × 3,415.50
4. Step 4: Simplify right side
   11,208.51x = 57,430,300.46
5. Step 5: Solve for x
   x = 57,430,300.46/11,208.51
6. Step 6: Final answer
   x = 5,123.81