Finding the Fourth Proportional to 13,978.51, 19,290.67 and 7,605.47

Step by Step Solution

1. Step 1: Write the proportion equation
   13,978.51 : 19,290.67 = 7,605.47 : x
2. Step 2: Convert to fraction form
   13,978.51/19,290.67 = 7,605.47/x
3. Step 3: Cross multiply
   13,978.51x = 19,290.67 × 7,605.47
4. Step 4: Simplify right side
   13,978.51x = 146,714,496.50
5. Step 5: Solve for x
   x = 146,714,496.50/13,978.51
6. Step 6: Final answer
   x = 10,495.72