Finding the Fourth Proportional to 65,991.31, 91,066.89 and 37,310.50

Step by Step Solution

1. Step 1: Write the proportion equation
   65,991.31 : 91,066.89 = 37,310.50 : x
2. Step 2: Convert to fraction form
   65,991.31/91,066.89 = 37,310.50/x
3. Step 3: Cross multiply
   65,991.31x = 91,066.89 × 37,310.50
4. Step 4: Simplify right side
   65,991.31x = 3,397,750,744.01
5. Step 5: Solve for x
   x = 3,397,750,744.01/65,991.31
6. Step 6: Final answer
   x = 51,487.85