Finding the Fourth Proportional to 1,061,918.72, 1,465,447.20 and 584,990.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061,918.72 : 1,465,447.20 = 584,990.72 : x
2. Step 2: Convert to fraction form
   1,061,918.72/1,465,447.20 = 584,990.72/x
3. Step 3: Cross multiply
   1,061,918.72x = 1,465,447.20 × 584,990.72
4. Step 4: Simplify right side
   1,061,918.72x = 857,273,012,649.98
5. Step 5: Solve for x
   x = 857,273,012,649.98/1,061,918.72
6. Step 6: Final answer
   x = 807,286.84