Finding the Fourth Proportional to 561,893,300.67, 842,456,870.58 and 285,010,608.42

Step by Step Solution

1. Step 1: Write the proportion equation
   561,893,300.67 : 842,456,870.58 = 285,010,608.42 : x
2. Step 2: Convert to fraction form
   561,893,300.67/842,456,870.58 = 285,010,608.42/x
3. Step 3: Cross multiply
   561,893,300.67x = 842,456,870.58 × 285,010,608.42
4. Step 4: Simplify right side
   561,893,300.67x = 240,109,145,251,615,040
5. Step 5: Solve for x
   x = 240,109,145,251,615,040/561,893,300.67
6. Step 6: Final answer
   x = 427,321,601.74