Finding the Fourth Proportional to 91,034.04, 136,370.84 and 42,936.78

Step by Step Solution

1. Step 1: Write the proportion equation
   91,034.04 : 136,370.84 = 42,936.78 : x
2. Step 2: Convert to fraction form
   91,034.04/136,370.84 = 42,936.78/x
3. Step 3: Cross multiply
   91,034.04x = 136,370.84 × 42,936.78
4. Step 4: Simplify right side
   91,034.04x = 5,855,324,540.81
5. Step 5: Solve for x
   x = 5,855,324,540.81/91,034.04
6. Step 6: Final answer
   x = 64,320.17