Finding the Fourth Proportional to 2,572.89, 3,858.53 and 929.22

Step by Step Solution

1. Step 1: Write the proportion equation
   2,572.89 : 3,858.53 = 929.22 : x
2. Step 2: Convert to fraction form
   2,572.89/3,858.53 = 929.22/x
3. Step 3: Cross multiply
   2,572.89x = 3,858.53 × 929.22
4. Step 4: Simplify right side
   2,572.89x = 3,585,418.60
5. Step 5: Solve for x
   x = 3,585,418.60/2,572.89
6. Step 6: Final answer
   x = 1,393.54