Finding the Fourth Proportional to 1,143,914.72, 1,578,742.30 and 660,479.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,143,914.72 : 1,578,742.30 = 660,479.05 : x
2. Step 2: Convert to fraction form
   1,143,914.72/1,578,742.30 = 660,479.05/x
3. Step 3: Cross multiply
   1,143,914.72x = 1,578,742.30 × 660,479.05
4. Step 4: Simplify right side
   1,143,914.72x = 1,042,726,214,498.82
5. Step 5: Solve for x
   x = 1,042,726,214,498.82/1,143,914.72
6. Step 6: Final answer
   x = 911,541.92