Finding the Fourth Proportional to 1,046.78, 1,569.71 and 526.45

Step by Step Solution

1. Step 1: Write the proportion equation
   1,046.78 : 1,569.71 = 526.45 : x
2. Step 2: Convert to fraction form
   1,046.78/1,569.71 = 526.45/x
3. Step 3: Cross multiply
   1,046.78x = 1,569.71 × 526.45
4. Step 4: Simplify right side
   1,046.78x = 826,374.15
5. Step 5: Solve for x
   x = 826,374.15/1,046.78
6. Step 6: Final answer
   x = 789.45