Finding the Fourth Proportional to 65,788.50, 90,802.71 and 45,399.18

Step by Step Solution

1. Step 1: Write the proportion equation
   65,788.50 : 90,802.71 = 45,399.18 : x
2. Step 2: Convert to fraction form
   65,788.50/90,802.71 = 45,399.18/x
3. Step 3: Cross multiply
   65,788.50x = 90,802.71 × 45,399.18
4. Step 4: Simplify right side
   65,788.50x = 4,122,368,575.78
5. Step 5: Solve for x
   x = 4,122,368,575.78/65,788.50
6. Step 6: Final answer
   x = 62,660.93