Finding the Fourth Proportional to 65,945.15, 90,954.10 and 56,762.34

Step by Step Solution

1. Step 1: Write the proportion equation
   65,945.15 : 90,954.10 = 56,762.34 : x
2. Step 2: Convert to fraction form
   65,945.15/90,954.10 = 56,762.34/x
3. Step 3: Cross multiply
   65,945.15x = 90,954.10 × 56,762.34
4. Step 4: Simplify right side
   65,945.15x = 5,162,766,810.01
5. Step 5: Solve for x
   x = 5,162,766,810.01/65,945.15
6. Step 6: Final answer
   x = 78,288.80