Finding the Fourth Proportional to 3,978.60, 5,962.98 and 1,378.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,978.60 : 5,962.98 = 1,378.50 : x
2. Step 2: Convert to fraction form
   3,978.60/5,962.98 = 1,378.50/x
3. Step 3: Cross multiply
   3,978.60x = 5,962.98 × 1,378.50
4. Step 4: Simplify right side
   3,978.60x = 8,219,967.93
5. Step 5: Solve for x
   x = 8,219,967.93/3,978.60
6. Step 6: Final answer
   x = 2,066.05