Finding the Fourth Proportional to 12,907.18, 17,811.39 and 7,602.22

Step by Step Solution

1. Step 1: Write the proportion equation
   12,907.18 : 17,811.39 = 7,602.22 : x
2. Step 2: Convert to fraction form
   12,907.18/17,811.39 = 7,602.22/x
3. Step 3: Cross multiply
   12,907.18x = 17,811.39 × 7,602.22
4. Step 4: Simplify right side
   12,907.18x = 135,406,105.29
5. Step 5: Solve for x
   x = 135,406,105.29/12,907.18
6. Step 6: Final answer
   x = 10,490.76