Finding the Fourth Proportional to 300,499,772.13, 415,078,684.61 and 248,498,860.77

Step by Step Solution

1. Step 1: Write the proportion equation
   300,499,772.13 : 415,078,684.61 = 248,498,860.77 : x
2. Step 2: Convert to fraction form
   300,499,772.13/415,078,684.61 = 248,498,860.77/x
3. Step 3: Cross multiply
   300,499,772.13x = 415,078,684.61 × 248,498,860.77
4. Step 4: Simplify right side
   300,499,772.13x = 103,146,580,254,252,640
5. Step 5: Solve for x
   x = 103,146,580,254,252,640/300,499,772.13
6. Step 6: Final answer
   x = 343,250,111.38