Finding the Fourth Proportional to 1,872.63, 2,810.57 and 1,007.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,872.63 : 2,810.57 = 1,007.55 : x
2. Step 2: Convert to fraction form
   1,872.63/2,810.57 = 1,007.55/x
3. Step 3: Cross multiply
   1,872.63x = 2,810.57 × 1,007.55
4. Step 4: Simplify right side
   1,872.63x = 2,831,784.77
5. Step 5: Solve for x
   x = 2,831,784.77/1,872.63
6. Step 6: Final answer
   x = 1,512.20