Finding the Fourth Proportional to 201,538.50, 278,123.40 and 112,114.50

Step by Step Solution

1. Step 1: Write the proportion equation
   201,538.50 : 278,123.40 = 112,114.50 : x
2. Step 2: Convert to fraction form
   201,538.50/278,123.40 = 112,114.50/x
3. Step 3: Cross multiply
   201,538.50x = 278,123.40 × 112,114.50
4. Step 4: Simplify right side
   201,538.50x = 31,181,665,929.30
5. Step 5: Solve for x
   x = 31,181,665,929.30/201,538.50
6. Step 6: Final answer
   x = 154,718.16