Finding the Fourth Proportional to 1,925.69, 2,888.89 and 771.53

Step by Step Solution

1. Step 1: Write the proportion equation
   1,925.69 : 2,888.89 = 771.53 : x
2. Step 2: Convert to fraction form
   1,925.69/2,888.89 = 771.53/x
3. Step 3: Cross multiply
   1,925.69x = 2,888.89 × 771.53
4. Step 4: Simplify right side
   1,925.69x = 2,228,848.93
5. Step 5: Solve for x
   x = 2,228,848.93/1,925.69
6. Step 6: Final answer
   x = 1,157.43