Finding the Fourth Proportional to 1,503.89, 2,075.27 and 840.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,503.89 : 2,075.27 = 840.79 : x
2. Step 2: Convert to fraction form
   1,503.89/2,075.27 = 840.79/x
3. Step 3: Cross multiply
   1,503.89x = 2,075.27 × 840.79
4. Step 4: Simplify right side
   1,503.89x = 1,744,866.26
5. Step 5: Solve for x
   x = 1,744,866.26/1,503.89
6. Step 6: Final answer
   x = 1,160.24