Finding the Fourth Proportional to 65,839.32, 90,248.76 and 64,953.36

Step by Step Solution

1. Step 1: Write the proportion equation
   65,839.32 : 90,248.76 = 64,953.36 : x
2. Step 2: Convert to fraction form
   65,839.32/90,248.76 = 64,953.36/x
3. Step 3: Cross multiply
   65,839.32x = 90,248.76 × 64,953.36
4. Step 4: Simplify right side
   65,839.32x = 5,861,960,197.83
5. Step 5: Solve for x
   x = 5,861,960,197.83/65,839.32
6. Step 6: Final answer
   x = 89,034.34