Finding the Fourth Proportional to 287,942,498.23, 397,635,081.61 and 272,255,574.72

Step by Step Solution

1. Step 1: Write the proportion equation
   287,942,498.23 : 397,635,081.61 = 272,255,574.72 : x
2. Step 2: Convert to fraction form
   287,942,498.23/397,635,081.61 = 272,255,574.72/x
3. Step 3: Cross multiply
   287,942,498.23x = 397,635,081.61 × 272,255,574.72
4. Step 4: Simplify right side
   287,942,498.23x = 108,258,367,672,564,672
5. Step 5: Solve for x
   x = 108,258,367,672,564,672/287,942,498.23
6. Step 6: Final answer
   x = 375,972,176.17