Finding the Fourth Proportional to 13,782.60, 19,018.56 and 7,814.79

Step by Step Solution

1. Step 1: Write the proportion equation
   13,782.60 : 19,018.56 = 7,814.79 : x
2. Step 2: Convert to fraction form
   13,782.60/19,018.56 = 7,814.79/x
3. Step 3: Cross multiply
   13,782.60x = 19,018.56 × 7,814.79
4. Step 4: Simplify right side
   13,782.60x = 148,626,052.50
5. Step 5: Solve for x
   x = 148,626,052.50/13,782.60
6. Step 6: Final answer
   x = 10,783.60