Finding the Fourth Proportional to 66,086.17, 91,199 and 35,871.50

Step by Step Solution

1. Step 1: Write the proportion equation
   66,086.17 : 91,199 = 35,871.50 : x
2. Step 2: Convert to fraction form
   66,086.17/91,199 = 35,871.50/x
3. Step 3: Cross multiply
   66,086.17x = 91,199 × 35,871.50
4. Step 4: Simplify right side
   66,086.17x = 3,271,444,928.50
5. Step 5: Solve for x
   x = 3,271,444,928.50/66,086.17
6. Step 6: Final answer
   x = 49,502.72