Finding the Fourth Proportional to 201,667.21, 278,296.37 and 111,019.70

Step by Step Solution

1. Step 1: Write the proportion equation
   201,667.21 : 278,296.37 = 111,019.70 : x
2. Step 2: Convert to fraction form
   201,667.21/278,296.37 = 111,019.70/x
3. Step 3: Cross multiply
   201,667.21x = 278,296.37 × 111,019.70
4. Step 4: Simplify right side
   201,667.21x = 30,896,379,508.49
5. Step 5: Solve for x
   x = 30,896,379,508.49/201,667.21
6. Step 6: Final answer
   x = 153,204.77