Finding the Fourth Proportional to 1,070.34, 1,477.56 and 677.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,070.34 : 1,477.56 = 677.89 : x
2. Step 2: Convert to fraction form
   1,070.34/1,477.56 = 677.89/x
3. Step 3: Cross multiply
   1,070.34x = 1,477.56 × 677.89
4. Step 4: Simplify right side
   1,070.34x = 1,001,623.72
5. Step 5: Solve for x
   x = 1,001,623.72/1,070.34
6. Step 6: Final answer
   x = 935.80