Finding the Fourth Proportional to 518,820.78, 773,073.32 and 462,226

Step by Step Solution

1. Step 1: Write the proportion equation
   518,820.78 : 773,073.32 = 462,226 : x
2. Step 2: Convert to fraction form
   518,820.78/773,073.32 = 462,226/x
3. Step 3: Cross multiply
   518,820.78x = 773,073.32 × 462,226
4. Step 4: Simplify right side
   518,820.78x = 357,334,588,410.32
5. Step 5: Solve for x
   x = 357,334,588,410.32/518,820.78
6. Step 6: Final answer
   x = 688,743.79