Finding the Fourth Proportional to 887,085.40, 1,330,300.05 and 288,066.10

Step by Step Solution

1. Step 1: Write the proportion equation
   887,085.40 : 1,330,300.05 = 288,066.10 : x
2. Step 2: Convert to fraction form
   887,085.40/1,330,300.05 = 288,066.10/x
3. Step 3: Cross multiply
   887,085.40x = 1,330,300.05 × 288,066.10
4. Step 4: Simplify right side
   887,085.40x = 383,214,347,233.31
5. Step 5: Solve for x
   x = 383,214,347,233.31/887,085.40
6. Step 6: Final answer
   x = 431,992.62