Finding the Fourth Proportional to 487,019.89, 672,085.48 and 272,159.91

Step by Step Solution

1. Step 1: Write the proportion equation
   487,019.89 : 672,085.48 = 272,159.91 : x
2. Step 2: Convert to fraction form
   487,019.89/672,085.48 = 272,159.91/x
3. Step 3: Cross multiply
   487,019.89x = 672,085.48 × 272,159.91
4. Step 4: Simplify right side
   487,019.89x = 182,914,723,749.11
5. Step 5: Solve for x
   x = 182,914,723,749.11/487,019.89
6. Step 6: Final answer
   x = 375,579.58