Finding the Fourth Proportional to 201,731.33, 278,391.15 and 111,090.50

Step by Step Solution

1. Step 1: Write the proportion equation
   201,731.33 : 278,391.15 = 111,090.50 : x
2. Step 2: Convert to fraction form
   201,731.33/278,391.15 = 111,090.50/x
3. Step 3: Cross multiply
   201,731.33x = 278,391.15 × 111,090.50
4. Step 4: Simplify right side
   201,731.33x = 30,926,610,657.12
5. Step 5: Solve for x
   x = 30,926,610,657.12/201,731.33
6. Step 6: Final answer
   x = 153,305.94