Finding the Fourth Proportional to 570,152.48, 786,290.64 and 489,554.72

Step by Step Solution

1. Step 1: Write the proportion equation
   570,152.48 : 786,290.64 = 489,554.72 : x
2. Step 2: Convert to fraction form
   570,152.48/786,290.64 = 489,554.72/x
3. Step 3: Cross multiply
   570,152.48x = 786,290.64 × 489,554.72
4. Step 4: Simplify right side
   570,152.48x = 384,932,294,103.82
5. Step 5: Solve for x
   x = 384,932,294,103.82/570,152.48
6. Step 6: Final answer
   x = 675,139.21