Finding the Fourth Proportional to 65,662.40, 91,225.82 and 64,875.08

Step by Step Solution

1. Step 1: Write the proportion equation
   65,662.40 : 91,225.82 = 64,875.08 : x
2. Step 2: Convert to fraction form
   65,662.40/91,225.82 = 64,875.08/x
3. Step 3: Cross multiply
   65,662.40x = 91,225.82 × 64,875.08
4. Step 4: Simplify right side
   65,662.40x = 5,918,282,370.57
5. Step 5: Solve for x
   x = 5,918,282,370.57/65,662.40
6. Step 6: Final answer
   x = 90,131.98