Finding the Fourth Proportional to 1,387.02, 1,914.21 and 797.67

Step by Step Solution

1. Step 1: Write the proportion equation
   1,387.02 : 1,914.21 = 797.67 : x
2. Step 2: Convert to fraction form
   1,387.02/1,914.21 = 797.67/x
3. Step 3: Cross multiply
   1,387.02x = 1,914.21 × 797.67
4. Step 4: Simplify right side
   1,387.02x = 1,526,907.89
5. Step 5: Solve for x
   x = 1,526,907.89/1,387.02
6. Step 6: Final answer
   x = 1,100.85