Finding the Fourth Proportional to 3,380.60, 5,070.72 and 1,071.92

Step by Step Solution

1. Step 1: Write the proportion equation
   3,380.60 : 5,070.72 = 1,071.92 : x
2. Step 2: Convert to fraction form
   3,380.60/5,070.72 = 1,071.92/x
3. Step 3: Cross multiply
   3,380.60x = 5,070.72 × 1,071.92
4. Step 4: Simplify right side
   3,380.60x = 5,435,406.18
5. Step 5: Solve for x
   x = 5,435,406.18/3,380.60
6. Step 6: Final answer
   x = 1,607.82