Finding the Fourth Proportional to 2,075.86, 3,114.24 and 615.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,075.86 : 3,114.24 = 615.12 : x
2. Step 2: Convert to fraction form
   2,075.86/3,114.24 = 615.12/x
3. Step 3: Cross multiply
   2,075.86x = 3,114.24 × 615.12
4. Step 4: Simplify right side
   2,075.86x = 1,915,631.31
5. Step 5: Solve for x
   x = 1,915,631.31/2,075.86
6. Step 6: Final answer
   x = 922.81