Finding the Fourth Proportional to 1,404.38, 2,105.88 and 526.64

Step by Step Solution

1. Step 1: Write the proportion equation
   1,404.38 : 2,105.88 = 526.64 : x
2. Step 2: Convert to fraction form
   1,404.38/2,105.88 = 526.64/x
3. Step 3: Cross multiply
   1,404.38x = 2,105.88 × 526.64
4. Step 4: Simplify right side
   1,404.38x = 1,109,030.11
5. Step 5: Solve for x
   x = 1,109,030.11/1,404.38
6. Step 6: Final answer
   x = 789.70