Finding the Fourth Proportional to 1,123,768.71, 1,685,301.69 and 375,639.75

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123,768.71 : 1,685,301.69 = 375,639.75 : x
2. Step 2: Convert to fraction form
   1,123,768.71/1,685,301.69 = 375,639.75/x
3. Step 3: Cross multiply
   1,123,768.71x = 1,685,301.69 × 375,639.75
4. Step 4: Simplify right side
   1,123,768.71x = 633,066,305,506.18
5. Step 5: Solve for x
   x = 633,066,305,506.18/1,123,768.71
6. Step 6: Final answer
   x = 563,342.17