Finding the Fourth Proportional to 269,931.42, 404,855.61 and 90,020.01

Step by Step Solution

1. Step 1: Write the proportion equation
   269,931.42 : 404,855.61 = 90,020.01 : x
2. Step 2: Convert to fraction form
   269,931.42/404,855.61 = 90,020.01/x
3. Step 3: Cross multiply
   269,931.42x = 404,855.61 × 90,020.01
4. Step 4: Simplify right side
   269,931.42x = 36,445,106,060.76
5. Step 5: Solve for x
   x = 36,445,106,060.76/269,931.42
6. Step 6: Final answer
   x = 135,016.17