Finding the Fourth Proportional to 1,771.51, 2,658.86 and 990.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,771.51 : 2,658.86 = 990.37 : x
2. Step 2: Convert to fraction form
   1,771.51/2,658.86 = 990.37/x
3. Step 3: Cross multiply
   1,771.51x = 2,658.86 × 990.37
4. Step 4: Simplify right side
   1,771.51x = 2,633,255.18
5. Step 5: Solve for x
   x = 2,633,255.18/1,771.51
6. Step 6: Final answer
   x = 1,486.45