Finding the Fourth Proportional to 760,928.99, 1,139,581.71 and 440,405.91

Step by Step Solution

1. Step 1: Write the proportion equation
   760,928.99 : 1,139,581.71 = 440,405.91 : x
2. Step 2: Convert to fraction form
   760,928.99/1,139,581.71 = 440,405.91/x
3. Step 3: Cross multiply
   760,928.99x = 1,139,581.71 × 440,405.91
4. Step 4: Simplify right side
   760,928.99x = 501,878,520,011.91
5. Step 5: Solve for x
   x = 501,878,520,011.91/760,928.99
6. Step 6: Final answer
   x = 659,560.26