Finding the Fourth Proportional to 1,404.07, 2,106.64 and 848.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,404.07 : 2,106.64 = 848.78 : x
2. Step 2: Convert to fraction form
   1,404.07/2,106.64 = 848.78/x
3. Step 3: Cross multiply
   1,404.07x = 2,106.64 × 848.78
4. Step 4: Simplify right side
   1,404.07x = 1,788,072.33
5. Step 5: Solve for x
   x = 1,788,072.33/1,404.07
6. Step 6: Final answer
   x = 1,273.49