Finding the Fourth Proportional to 1,807.02, 2,493.72 and 999.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,807.02 : 2,493.72 = 999.50 : x
2. Step 2: Convert to fraction form
   1,807.02/2,493.72 = 999.50/x
3. Step 3: Cross multiply
   1,807.02x = 2,493.72 × 999.50
4. Step 4: Simplify right side
   1,807.02x = 2,492,458.17
5. Step 5: Solve for x
   x = 2,492,458.17/1,807.02
6. Step 6: Final answer
   x = 1,379.32