Finding the Fourth Proportional to 1,123.93, 1,681.39 and 971.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.93 : 1,681.39 = 971.50 : x
2. Step 2: Convert to fraction form
   1,123.93/1,681.39 = 971.50/x
3. Step 3: Cross multiply
   1,123.93x = 1,681.39 × 971.50
4. Step 4: Simplify right side
   1,123.93x = 1,633,470.55
5. Step 5: Solve for x
   x = 1,633,470.55/1,123.93
6. Step 6: Final answer
   x = 1,453.35