Finding the Fourth Proportional to 201,809.52, 278,499.06 and 111,165.90

Step by Step Solution

1. Step 1: Write the proportion equation
   201,809.52 : 278,499.06 = 111,165.90 : x
2. Step 2: Convert to fraction form
   201,809.52/278,499.06 = 111,165.90/x
3. Step 3: Cross multiply
   201,809.52x = 278,499.06 × 111,165.90
4. Step 4: Simplify right side
   201,809.52x = 30,959,598,654.05
5. Step 5: Solve for x
   x = 30,959,598,654.05/201,809.52
6. Step 6: Final answer
   x = 153,410.00