Finding the Fourth Proportional to 201,839.50, 278,538.51 and 112,415.50

Step by Step Solution

1. Step 1: Write the proportion equation
   201,839.50 : 278,538.51 = 112,415.50 : x
2. Step 2: Convert to fraction form
   201,839.50/278,538.51 = 112,415.50/x
3. Step 3: Cross multiply
   201,839.50x = 278,538.51 × 112,415.50
4. Step 4: Simplify right side
   201,839.50x = 31,312,045,870.91
5. Step 5: Solve for x
   x = 31,312,045,870.91/201,839.50
6. Step 6: Final answer
   x = 155,133.39