Finding the Fourth Proportional to 65,623, 90,559.74 and 40,487.08

Step by Step Solution

1. Step 1: Write the proportion equation
   65,623 : 90,559.74 = 40,487.08 : x
2. Step 2: Convert to fraction form
   65,623/90,559.74 = 40,487.08/x
3. Step 3: Cross multiply
   65,623x = 90,559.74 × 40,487.08
4. Step 4: Simplify right side
   65,623x = 3,666,499,438.16
5. Step 5: Solve for x
   x = 3,666,499,438.16/65,623
6. Step 6: Final answer
   x = 55,872.17