Finding the Fourth Proportional to 1,149,621.94, 1,586,478.72 and 666,467.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,149,621.94 : 1,586,478.72 = 666,467.20 : x
2. Step 2: Convert to fraction form
   1,149,621.94/1,586,478.72 = 666,467.20/x
3. Step 3: Cross multiply
   1,149,621.94x = 1,586,478.72 × 666,467.20
4. Step 4: Simplify right side
   1,149,621.94x = 1,057,336,030,377.98
5. Step 5: Solve for x
   x = 1,057,336,030,377.98/1,149,621.94
6. Step 6: Final answer
   x = 919,724.99