Finding the Fourth Proportional to 660,590.72, 911,636.72 and 374,104.64

Step by Step Solution

1. Step 1: Write the proportion equation
   660,590.72 : 911,636.72 = 374,104.64 : x
2. Step 2: Convert to fraction form
   660,590.72/911,636.72 = 374,104.64/x
3. Step 3: Cross multiply
   660,590.72x = 911,636.72 × 374,104.64
4. Step 4: Simplify right side
   660,590.72x = 341,047,526,946.38
5. Step 5: Solve for x
   x = 341,047,526,946.38/660,590.72
6. Step 6: Final answer
   x = 516,276.59