Finding the Fourth Proportional to 3,191.10, 4,787.17 and 999.30

Step by Step Solution

1. Step 1: Write the proportion equation
   3,191.10 : 4,787.17 = 999.30 : x
2. Step 2: Convert to fraction form
   3,191.10/4,787.17 = 999.30/x
3. Step 3: Cross multiply
   3,191.10x = 4,787.17 × 999.30
4. Step 4: Simplify right side
   3,191.10x = 4,783,834.43
5. Step 5: Solve for x
   x = 4,783,834.43/3,191.10
6. Step 6: Final answer
   x = 1,499.12