Finding the Fourth Proportional to 1,636.98, 2,259.12 and 973.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,636.98 : 2,259.12 = 973.86 : x
2. Step 2: Convert to fraction form
   1,636.98/2,259.12 = 973.86/x
3. Step 3: Cross multiply
   1,636.98x = 2,259.12 × 973.86
4. Step 4: Simplify right side
   1,636.98x = 2,200,066.60
5. Step 5: Solve for x
   x = 2,200,066.60/1,636.98
6. Step 6: Final answer
   x = 1,343.98