Finding the Fourth Proportional to 14,178.39, 19,565.98 and 7,890.76

Step by Step Solution

1. Step 1: Write the proportion equation
   14,178.39 : 19,565.98 = 7,890.76 : x
2. Step 2: Convert to fraction form
   14,178.39/19,565.98 = 7,890.76/x
3. Step 3: Cross multiply
   14,178.39x = 19,565.98 × 7,890.76
4. Step 4: Simplify right side
   14,178.39x = 154,390,412.89
5. Step 5: Solve for x
   x = 154,390,412.89/14,178.39
6. Step 6: Final answer
   x = 10,889.14