Finding the Fourth Proportional to 65,693.42, 90,656.89 and 35,478.74

Step by Step Solution

1. Step 1: Write the proportion equation
   65,693.42 : 90,656.89 = 35,478.74 : x
2. Step 2: Convert to fraction form
   65,693.42/90,656.89 = 35,478.74/x
3. Step 3: Cross multiply
   65,693.42x = 90,656.89 × 35,478.74
4. Step 4: Simplify right side
   65,693.42x = 3,216,392,613.83
5. Step 5: Solve for x
   x = 3,216,392,613.83/65,693.42
6. Step 6: Final answer
   x = 48,960.65