Finding the Fourth Proportional to 65,090.18, 90,284.57 and 63,362.81

Step by Step Solution

1. Step 1: Write the proportion equation
   65,090.18 : 90,284.57 = 63,362.81 : x
2. Step 2: Convert to fraction form
   65,090.18/90,284.57 = 63,362.81/x
3. Step 3: Cross multiply
   65,090.18x = 90,284.57 × 63,362.81
4. Step 4: Simplify right side
   65,090.18x = 5,720,684,049.91
5. Step 5: Solve for x
   x = 5,720,684,049.91/65,090.18
6. Step 6: Final answer
   x = 87,888.59