Finding the Fourth Proportional to 425,796.34, 638,680.61 and 173,002.07

Step by Step Solution

1. Step 1: Write the proportion equation
   425,796.34 : 638,680.61 = 173,002.07 : x
2. Step 2: Convert to fraction form
   425,796.34/638,680.61 = 173,002.07/x
3. Step 3: Cross multiply
   425,796.34x = 638,680.61 × 173,002.07
4. Step 4: Simplify right side
   425,796.34x = 110,493,068,330.55
5. Step 5: Solve for x
   x = 110,493,068,330.55/425,796.34
6. Step 6: Final answer
   x = 259,497.46