Finding the Fourth Proportional to 3,762.05, 5,643.32 and 988.79

Step by Step Solution

1. Step 1: Write the proportion equation
   3,762.05 : 5,643.32 = 988.79 : x
2. Step 2: Convert to fraction form
   3,762.05/5,643.32 = 988.79/x
3. Step 3: Cross multiply
   3,762.05x = 5,643.32 × 988.79
4. Step 4: Simplify right side
   3,762.05x = 5,580,025.22
5. Step 5: Solve for x
   x = 5,580,025.22/3,762.05
6. Step 6: Final answer
   x = 1,483.24