Finding the Fourth Proportional to 1,636.05, 2,257.69 and 972.93

Step by Step Solution

1. Step 1: Write the proportion equation
   1,636.05 : 2,257.69 = 972.93 : x
2. Step 2: Convert to fraction form
   1,636.05/2,257.69 = 972.93/x
3. Step 3: Cross multiply
   1,636.05x = 2,257.69 × 972.93
4. Step 4: Simplify right side
   1,636.05x = 2,196,574.33
5. Step 5: Solve for x
   x = 2,196,574.33/1,636.05
6. Step 6: Final answer
   x = 1,342.61