Finding the Fourth Proportional to 487,467, 672,698.79 and 272,605.05

Step by Step Solution

1. Step 1: Write the proportion equation
   487,467 : 672,698.79 = 272,605.05 : x
2. Step 2: Convert to fraction form
   487,467/672,698.79 = 272,605.05/x
3. Step 3: Cross multiply
   487,467x = 672,698.79 × 272,605.05
4. Step 4: Simplify right side
   487,467x = 183,381,087,282.89
5. Step 5: Solve for x
   x = 183,381,087,282.89/487,467
6. Step 6: Final answer
   x = 376,191.80