Finding the Fourth Proportional to 660,870.32, 911,971.32 and 374,384.56

Step by Step Solution

1. Step 1: Write the proportion equation
   660,870.32 : 911,971.32 = 374,384.56 : x
2. Step 2: Convert to fraction form
   660,870.32/911,971.32 = 374,384.56/x
3. Step 3: Cross multiply
   660,870.32x = 911,971.32 × 374,384.56
4. Step 4: Simplify right side
   660,870.32x = 341,427,981,370.82
5. Step 5: Solve for x
   x = 341,427,981,370.82/660,870.32
6. Step 6: Final answer
   x = 516,633.86