Finding the Fourth Proportional to 1,123,690.52, 1,550,339.60 and 687,653.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123,690.52 : 1,550,339.60 = 687,653.30 : x
2. Step 2: Convert to fraction form
   1,123,690.52/1,550,339.60 = 687,653.30/x
3. Step 3: Cross multiply
   1,123,690.52x = 1,550,339.60 × 687,653.30
4. Step 4: Simplify right side
   1,123,690.52x = 1,066,096,133,777.60
5. Step 5: Solve for x
   x = 1,066,096,133,777.60/1,123,690.52
6. Step 6: Final answer
   x = 948,745.33