Finding the Fourth Proportional to 1,204,146.72, 1,804,955.76 and 405,150.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,204,146.72 : 1,804,955.76 = 405,150.88 : x
2. Step 2: Convert to fraction form
   1,204,146.72/1,804,955.76 = 405,150.88/x
3. Step 3: Cross multiply
   1,204,146.72x = 1,804,955.76 × 405,150.88
4. Step 4: Simplify right side
   1,204,146.72x = 731,279,414,525.07
5. Step 5: Solve for x
   x = 731,279,414,525.07/1,204,146.72
6. Step 6: Final answer
   x = 607,300.92