Finding the Fourth Proportional to 300,499,785.63, 415,078,703.28 and 248,498,874.27

Step by Step Solution

1. Step 1: Write the proportion equation
   300,499,785.63 : 415,078,703.28 = 248,498,874.27 : x
2. Step 2: Convert to fraction form
   300,499,785.63/415,078,703.28 = 248,498,874.27/x
3. Step 3: Cross multiply
   300,499,785.63x = 415,078,703.28 × 248,498,874.27
4. Step 4: Simplify right side
   300,499,785.63x = 103,146,590,498,531,360
5. Step 5: Solve for x
   x = 103,146,590,498,531,360/300,499,785.63
6. Step 6: Final answer
   x = 343,250,130.05