Finding the Fourth Proportional to 660,372.72, 911,314.71 and 358,566.72

Step by Step Solution

1. Step 1: Write the proportion equation
   660,372.72 : 911,314.71 = 358,566.72 : x
2. Step 2: Convert to fraction form
   660,372.72/911,314.71 = 358,566.72/x
3. Step 3: Cross multiply
   660,372.72x = 911,314.71 × 358,566.72
4. Step 4: Simplify right side
   660,372.72x = 326,767,126,452.45
5. Step 5: Solve for x
   x = 326,767,126,452.45/660,372.72
6. Step 6: Final answer
   x = 494,822.27