Finding the Fourth Proportional to 12,669.58, 17,478.53 and 7,290.87

Step by Step Solution

1. Step 1: Write the proportion equation
   12,669.58 : 17,478.53 = 7,290.87 : x
2. Step 2: Convert to fraction form
   12,669.58/17,478.53 = 7,290.87/x
3. Step 3: Cross multiply
   12,669.58x = 17,478.53 × 7,290.87
4. Step 4: Simplify right side
   12,669.58x = 127,433,566.17
5. Step 5: Solve for x
   x = 127,433,566.17/12,669.58
6. Step 6: Final answer
   x = 10,058.23