Finding the Fourth Proportional to 2,925.58, 4,388.59 and 977.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,925.58 : 4,388.59 = 977.78 : x
2. Step 2: Convert to fraction form
   2,925.58/4,388.59 = 977.78/x
3. Step 3: Cross multiply
   2,925.58x = 4,388.59 × 977.78
4. Step 4: Simplify right side
   2,925.58x = 4,291,075.53
5. Step 5: Solve for x
   x = 4,291,075.53/2,925.58
6. Step 6: Final answer
   x = 1,466.75