Finding the Fourth Proportional to 2,572.98, 3,858.54 and 929.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,572.98 : 3,858.54 = 929.10 : x
2. Step 2: Convert to fraction form
   2,572.98/3,858.54 = 929.10/x
3. Step 3: Cross multiply
   2,572.98x = 3,858.54 × 929.10
4. Step 4: Simplify right side
   2,572.98x = 3,584,969.51
5. Step 5: Solve for x
   x = 3,584,969.51/2,572.98
6. Step 6: Final answer
   x = 1,393.31