Finding the Fourth Proportional to 13,980.25, 19,291.86 and 7,606.78

Step by Step Solution

1. Step 1: Write the proportion equation
   13,980.25 : 19,291.86 = 7,606.78 : x
2. Step 2: Convert to fraction form
   13,980.25/19,291.86 = 7,606.78/x
3. Step 3: Cross multiply
   13,980.25x = 19,291.86 × 7,606.78
4. Step 4: Simplify right side
   13,980.25x = 146,748,934.81
5. Step 5: Solve for x
   x = 146,748,934.81/13,980.25
6. Step 6: Final answer
   x = 10,496.87