Finding the Fourth Proportional to 3,588.02, 5,382.15 and 990.98

Step by Step Solution

1. Step 1: Write the proportion equation
   3,588.02 : 5,382.15 = 990.98 : x
2. Step 2: Convert to fraction form
   3,588.02/5,382.15 = 990.98/x
3. Step 3: Cross multiply
   3,588.02x = 5,382.15 × 990.98
4. Step 4: Simplify right side
   3,588.02x = 5,333,603.01
5. Step 5: Solve for x
   x = 5,333,603.01/3,588.02
6. Step 6: Final answer
   x = 1,486.50