Finding the Fourth Proportional to 1,123,506.25, 1,550,239.32 and 664,640.17

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123,506.25 : 1,550,239.32 = 664,640.17 : x
2. Step 2: Convert to fraction form
   1,123,506.25/1,550,239.32 = 664,640.17/x
3. Step 3: Cross multiply
   1,123,506.25x = 1,550,239.32 × 664,640.17
4. Step 4: Simplify right side
   1,123,506.25x = 1,030,351,323,802.29
5. Step 5: Solve for x
   x = 1,030,351,323,802.29/1,123,506.25
6. Step 6: Final answer
   x = 917,085.53