Finding the Fourth Proportional to 65,974.71, 91,057.30 and 37,680.40

Step by Step Solution

1. Step 1: Write the proportion equation
   65,974.71 : 91,057.30 = 37,680.40 : x
2. Step 2: Convert to fraction form
   65,974.71/91,057.30 = 37,680.40/x
3. Step 3: Cross multiply
   65,974.71x = 91,057.30 × 37,680.40
4. Step 4: Simplify right side
   65,974.71x = 3,431,075,506.54
5. Step 5: Solve for x
   x = 3,431,075,506.54/65,974.71
6. Step 6: Final answer
   x = 52,005.92