Finding the Fourth Proportional to 13,978.98, 19,290.75 and 7,605.42

Step by Step Solution

1. Step 1: Write the proportion equation
   13,978.98 : 19,290.75 = 7,605.42 : x
2. Step 2: Convert to fraction form
   13,978.98/19,290.75 = 7,605.42/x
3. Step 3: Cross multiply
   13,978.98x = 19,290.75 × 7,605.42
4. Step 4: Simplify right side
   13,978.98x = 146,714,255.87
5. Step 5: Solve for x
   x = 146,714,255.87/13,978.98
6. Step 6: Final answer
   x = 10,495.35