Finding the Fourth Proportional to 65,978.60, 91,048.74 and 35,762.60

Step by Step Solution

1. Step 1: Write the proportion equation
   65,978.60 : 91,048.74 = 35,762.60 : x
2. Step 2: Convert to fraction form
   65,978.60/91,048.74 = 35,762.60/x
3. Step 3: Cross multiply
   65,978.60x = 91,048.74 × 35,762.60
4. Step 4: Simplify right side
   65,978.60x = 3,256,139,669.12
5. Step 5: Solve for x
   x = 3,256,139,669.12/65,978.60
6. Step 6: Final answer
   x = 49,351.45