Finding the Fourth Proportional to 2,538.86, 3,808.77 and 999.98

Step by Step Solution

1. Step 1: Write the proportion equation
   2,538.86 : 3,808.77 = 999.98 : x
2. Step 2: Convert to fraction form
   2,538.86/3,808.77 = 999.98/x
3. Step 3: Cross multiply
   2,538.86x = 3,808.77 × 999.98
4. Step 4: Simplify right side
   2,538.86x = 3,808,693.82
5. Step 5: Solve for x
   x = 3,808,693.82/2,538.86
6. Step 6: Final answer
   x = 1,500.16