Finding the Fourth Proportional to 1,123.07, 1,688.45 and 882.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.07 : 1,688.45 = 882.50 : x
2. Step 2: Convert to fraction form
   1,123.07/1,688.45 = 882.50/x
3. Step 3: Cross multiply
   1,123.07x = 1,688.45 × 882.50
4. Step 4: Simplify right side
   1,123.07x = 1,490,044.27
5. Step 5: Solve for x
   x = 1,490,044.27/1,123.07
6. Step 6: Final answer
   x = 1,326.77