Finding the Fourth Proportional to 65,498.74, 90,388.25 and 35,690.74

Step by Step Solution

1. Step 1: Write the proportion equation
   65,498.74 : 90,388.25 = 35,690.74 : x
2. Step 2: Convert to fraction form
   65,498.74/90,388.25 = 35,690.74/x
3. Step 3: Cross multiply
   65,498.74x = 90,388.25 × 35,690.74
4. Step 4: Simplify right side
   65,498.74x = 3,226,023,351.35
5. Step 5: Solve for x
   x = 3,226,023,351.35/65,498.74
6. Step 6: Final answer
   x = 49,253.21