Finding the Fourth Proportional to 1,601.91, 2,210.67 and 938.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,601.91 : 2,210.67 = 938.79 : x
2. Step 2: Convert to fraction form
   1,601.91/2,210.67 = 938.79/x
3. Step 3: Cross multiply
   1,601.91x = 2,210.67 × 938.79
4. Step 4: Simplify right side
   1,601.91x = 2,075,354.89
5. Step 5: Solve for x
   x = 2,075,354.89/1,601.91
6. Step 6: Final answer
   x = 1,295.55