Finding the Fourth Proportional to 896,300.19, 1,236,878.33 and 488,404.89

Step by Step Solution

1. Step 1: Write the proportion equation
   896,300.19 : 1,236,878.33 = 488,404.89 : x
2. Step 2: Convert to fraction form
   896,300.19/1,236,878.33 = 488,404.89/x
3. Step 3: Cross multiply
   896,300.19x = 1,236,878.33 × 488,404.89
4. Step 4: Simplify right side
   896,300.19x = 604,097,422,265.01
5. Step 5: Solve for x
   x = 604,097,422,265.01/896,300.19
6. Step 6: Final answer
   x = 673,990.06