Finding the Fourth Proportional to 91,290.27, 136,731.20 and 52,774.59

Step by Step Solution

1. Step 1: Write the proportion equation
   91,290.27 : 136,731.20 = 52,774.59 : x
2. Step 2: Convert to fraction form
   91,290.27/136,731.20 = 52,774.59/x
3. Step 3: Cross multiply
   91,290.27x = 136,731.20 × 52,774.59
4. Step 4: Simplify right side
   91,290.27x = 7,215,933,020.21
5. Step 5: Solve for x
   x = 7,215,933,020.21/91,290.27
6. Step 6: Final answer
   x = 79,043.83