Finding the Fourth Proportional to 1,143,914.17, 1,578,676.35 and 660,499.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,143,914.17 : 1,578,676.35 = 660,499.69 : x
2. Step 2: Convert to fraction form
   1,143,914.17/1,578,676.35 = 660,499.69/x
3. Step 3: Cross multiply
   1,143,914.17x = 1,578,676.35 × 660,499.69
4. Step 4: Simplify right side
   1,143,914.17x = 1,042,715,239,785.33
5. Step 5: Solve for x
   x = 1,042,715,239,785.33/1,143,914.17
6. Step 6: Final answer
   x = 911,532.76