Finding the Fourth Proportional to 14,259.71, 19,678.28 and 7,886.59

Step by Step Solution

1. Step 1: Write the proportion equation
   14,259.71 : 19,678.28 = 7,886.59 : x
2. Step 2: Convert to fraction form
   14,259.71/19,678.28 = 7,886.59/x
3. Step 3: Cross multiply
   14,259.71x = 19,678.28 × 7,886.59
4. Step 4: Simplify right side
   14,259.71x = 155,194,437.64
5. Step 5: Solve for x
   x = 155,194,437.64/14,259.71
6. Step 6: Final answer
   x = 10,883.42