Finding the Fourth Proportional to 91,277.84, 136,928.27 and 31,290.05

Step by Step Solution

1. Step 1: Write the proportion equation
   91,277.84 : 136,928.27 = 31,290.05 : x
2. Step 2: Convert to fraction form
   91,277.84/136,928.27 = 31,290.05/x
3. Step 3: Cross multiply
   91,277.84x = 136,928.27 × 31,290.05
4. Step 4: Simplify right side
   91,277.84x = 4,284,492,065.04
5. Step 5: Solve for x
   x = 4,284,492,065.04/91,277.84
6. Step 6: Final answer
   x = 46,939.02