Finding the Fourth Proportional to 13,978.53, 19,290.18 and 7,605.05

Step by Step Solution

1. Step 1: Write the proportion equation
   13,978.53 : 19,290.18 = 7,605.05 : x
2. Step 2: Convert to fraction form
   13,978.53/19,290.18 = 7,605.05/x
3. Step 3: Cross multiply
   13,978.53x = 19,290.18 × 7,605.05
4. Step 4: Simplify right side
   13,978.53x = 146,702,664.87
5. Step 5: Solve for x
   x = 146,702,664.87/13,978.53
6. Step 6: Final answer
   x = 10,494.86