Finding the Fourth Proportional to 1,258,938.72, 1,888,676.60 and 406,058.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,258,938.72 : 1,888,676.60 = 406,058.27 : x
2. Step 2: Convert to fraction form
   1,258,938.72/1,888,676.60 = 406,058.27/x
3. Step 3: Cross multiply
   1,258,938.72x = 1,888,676.60 × 406,058.27
4. Step 4: Simplify right side
   1,258,938.72x = 766,912,741,311.81
5. Step 5: Solve for x
   x = 766,912,741,311.81/1,258,938.72
6. Step 6: Final answer
   x = 609,174.00