Finding the Fourth Proportional to 13,769.60, 19,002.72 and 7,800.96

Step by Step Solution

1. Step 1: Write the proportion equation
   13,769.60 : 19,002.72 = 7,800.96 : x
2. Step 2: Convert to fraction form
   13,769.60/19,002.72 = 7,800.96/x
3. Step 3: Cross multiply
   13,769.60x = 19,002.72 × 7,800.96
4. Step 4: Simplify right side
   13,769.60x = 148,239,458.61
5. Step 5: Solve for x
   x = 148,239,458.61/13,769.60
6. Step 6: Final answer
   x = 10,765.71