Finding the Fourth Proportional to 1,501.79, 2,072.39 and 838.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,501.79 : 2,072.39 = 838.50 : x
2. Step 2: Convert to fraction form
   1,501.79/2,072.39 = 838.50/x
3. Step 3: Cross multiply
   1,501.79x = 2,072.39 × 838.50
4. Step 4: Simplify right side
   1,501.79x = 1,737,694.82
5. Step 5: Solve for x
   x = 1,737,694.82/1,501.79
6. Step 6: Final answer
   x = 1,157.09