Finding the Fourth Proportional to 2,573.60, 3,858.66 and 929.91

Step by Step Solution

1. Step 1: Write the proportion equation
   2,573.60 : 3,858.66 = 929.91 : x
2. Step 2: Convert to fraction form
   2,573.60/3,858.66 = 929.91/x
3. Step 3: Cross multiply
   2,573.60x = 3,858.66 × 929.91
4. Step 4: Simplify right side
   2,573.60x = 3,588,206.52
5. Step 5: Solve for x
   x = 3,588,206.52/2,573.60
6. Step 6: Final answer
   x = 1,394.24