Finding the Fourth Proportional to 3,929.58, 5,814.18 and 3,918.78

Step by Step Solution

1. Step 1: Write the proportion equation
   3,929.58 : 5,814.18 = 3,918.78 : x
2. Step 2: Convert to fraction form
   3,929.58/5,814.18 = 3,918.78/x
3. Step 3: Cross multiply
   3,929.58x = 5,814.18 × 3,918.78
4. Step 4: Simplify right side
   3,929.58x = 22,784,492.30
5. Step 5: Solve for x
   x = 22,784,492.30/3,929.58
6. Step 6: Final answer
   x = 5,798.20