Finding the Fourth Proportional to 1,204,141.96, 1,804,948.56 and 405,146.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,204,141.96 : 1,804,948.56 = 405,146.12 : x
2. Step 2: Convert to fraction form
   1,204,141.96/1,804,948.56 = 405,146.12/x
3. Step 3: Cross multiply
   1,204,141.96x = 1,804,948.56 × 405,146.12
4. Step 4: Simplify right side
   1,204,141.96x = 731,267,905,883.59
5. Step 5: Solve for x
   x = 731,267,905,883.59/1,204,141.96
6. Step 6: Final answer
   x = 607,293.77