Finding the Fourth Proportional to 1,947.53, 2,918.57 and 1,070.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,947.53 : 2,918.57 = 1,070.21 : x
2. Step 2: Convert to fraction form
   1,947.53/2,918.57 = 1,070.21/x
3. Step 3: Cross multiply
   1,947.53x = 2,918.57 × 1,070.21
4. Step 4: Simplify right side
   1,947.53x = 3,123,462.86
5. Step 5: Solve for x
   x = 3,123,462.86/1,947.53
6. Step 6: Final answer
   x = 1,603.81