Finding the Fourth Proportional to 2,379.06, 3,567.42 and 991.98

Step by Step Solution

1. Step 1: Write the proportion equation
   2,379.06 : 3,567.42 = 991.98 : x
2. Step 2: Convert to fraction form
   2,379.06/3,567.42 = 991.98/x
3. Step 3: Cross multiply
   2,379.06x = 3,567.42 × 991.98
4. Step 4: Simplify right side
   2,379.06x = 3,538,809.29
5. Step 5: Solve for x
   x = 3,538,809.29/2,379.06
6. Step 6: Final answer
   x = 1,487.48