Finding the Fourth Proportional to 3,914.22, 5,870.85 and 992.55

Step by Step Solution

1. Step 1: Write the proportion equation
   3,914.22 : 5,870.85 = 992.55 : x
2. Step 2: Convert to fraction form
   3,914.22/5,870.85 = 992.55/x
3. Step 3: Cross multiply
   3,914.22x = 5,870.85 × 992.55
4. Step 4: Simplify right side
   3,914.22x = 5,827,112.17
5. Step 5: Solve for x
   x = 5,827,112.17/3,914.22
6. Step 6: Final answer
   x = 1,488.70