Finding the Fourth Proportional to 456,003.32, 680,665.70 and 402,136.09

Step by Step Solution

1. Step 1: Write the proportion equation
   456,003.32 : 680,665.70 = 402,136.09 : x
2. Step 2: Convert to fraction form
   456,003.32/680,665.70 = 402,136.09/x
3. Step 3: Cross multiply
   456,003.32x = 680,665.70 × 402,136.09
4. Step 4: Simplify right side
   456,003.32x = 273,720,242,498.79
5. Step 5: Solve for x
   x = 273,720,242,498.79/456,003.32
6. Step 6: Final answer
   x = 600,259.33