Finding the Fourth Proportional to 65,990.81, 91,066.20 and 37,310

Step by Step Solution

1. Step 1: Write the proportion equation
   65,990.81 : 91,066.20 = 37,310 : x
2. Step 2: Convert to fraction form
   65,990.81/91,066.20 = 37,310/x
3. Step 3: Cross multiply
   65,990.81x = 91,066.20 × 37,310
4. Step 4: Simplify right side
   65,990.81x = 3,397,679,922
5. Step 5: Solve for x
   x = 3,397,679,922/65,990.81
6. Step 6: Final answer
   x = 51,487.17