Finding the Fourth Proportional to 726,905, 1,003,106.52 and 404,606.80

Step by Step Solution

1. Step 1: Write the proportion equation
   726,905 : 1,003,106.52 = 404,606.80 : x
2. Step 2: Convert to fraction form
   726,905/1,003,106.52 = 404,606.80/x
3. Step 3: Cross multiply
   726,905x = 1,003,106.52 × 404,606.80
4. Step 4: Simplify right side
   726,905x = 405,863,719,116.34
5. Step 5: Solve for x
   x = 405,863,719,116.34/726,905
6. Step 6: Final answer
   x = 558,344.93