Finding the Fourth Proportional to 920,081.80, 1,380,177.81 and 288,995.59

Step by Step Solution

1. Step 1: Write the proportion equation
   920,081.80 : 1,380,177.81 = 288,995.59 : x
2. Step 2: Convert to fraction form
   920,081.80/1,380,177.81 = 288,995.59/x
3. Step 3: Cross multiply
   920,081.80x = 1,380,177.81 × 288,995.59
4. Step 4: Simplify right side
   920,081.80x = 398,865,300,505.86
5. Step 5: Solve for x
   x = 398,865,300,505.86/920,081.80
6. Step 6: Final answer
   x = 433,510.69