Finding the Fourth Proportional to 2,870.03, 4,303.62 and 921.98

Step by Step Solution

1. Step 1: Write the proportion equation
   2,870.03 : 4,303.62 = 921.98 : x
2. Step 2: Convert to fraction form
   2,870.03/4,303.62 = 921.98/x
3. Step 3: Cross multiply
   2,870.03x = 4,303.62 × 921.98
4. Step 4: Simplify right side
   2,870.03x = 3,967,851.57
5. Step 5: Solve for x
   x = 3,967,851.57/2,870.03
6. Step 6: Final answer
   x = 1,382.51