Finding the Fourth Proportional to 2,925.72, 4,388.31 and 977.94

Step by Step Solution

1. Step 1: Write the proportion equation
   2,925.72 : 4,388.31 = 977.94 : x
2. Step 2: Convert to fraction form
   2,925.72/4,388.31 = 977.94/x
3. Step 3: Cross multiply
   2,925.72x = 4,388.31 × 977.94
4. Step 4: Simplify right side
   2,925.72x = 4,291,503.88
5. Step 5: Solve for x
   x = 4,291,503.88/2,925.72
6. Step 6: Final answer
   x = 1,466.82