Finding the Fourth Proportional to 201,978.50, 278,728.80 and 111,334.46

Step by Step Solution

1. Step 1: Write the proportion equation
   201,978.50 : 278,728.80 = 111,334.46 : x
2. Step 2: Convert to fraction form
   201,978.50/278,728.80 = 111,334.46/x
3. Step 3: Cross multiply
   201,978.50x = 278,728.80 × 111,334.46
4. Step 4: Simplify right side
   201,978.50x = 31,032,120,434.45
5. Step 5: Solve for x
   x = 31,032,120,434.45/201,978.50
6. Step 6: Final answer
   x = 153,640.71