Finding the Fourth Proportional to 455,488.31, 628,598.78 and 251,538.72

Step by Step Solution

1. Step 1: Write the proportion equation
   455,488.31 : 628,598.78 = 251,538.72 : x
2. Step 2: Convert to fraction form
   455,488.31/628,598.78 = 251,538.72/x
3. Step 3: Cross multiply
   455,488.31x = 628,598.78 × 251,538.72
4. Step 4: Simplify right side
   455,488.31x = 158,116,929,843.09
5. Step 5: Solve for x
   x = 158,116,929,843.09/455,488.31
6. Step 6: Final answer
   x = 347,137.18