Finding the Fourth Proportional to 499,164.22, 688,846.56 and 272,809.72

Step by Step Solution

1. Step 1: Write the proportion equation
   499,164.22 : 688,846.56 = 272,809.72 : x
2. Step 2: Convert to fraction form
   499,164.22/688,846.56 = 272,809.72/x
3. Step 3: Cross multiply
   499,164.22x = 688,846.56 × 272,809.72
4. Step 4: Simplify right side
   499,164.22x = 187,924,037,156.56
5. Step 5: Solve for x
   x = 187,924,037,156.56/499,164.22
6. Step 6: Final answer
   x = 376,477.38