Finding the Fourth Proportional to 1,384.56, 2,070.63 and 1,255.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,384.56 : 2,070.63 = 1,255.37 : x
2. Step 2: Convert to fraction form
   1,384.56/2,070.63 = 1,255.37/x
3. Step 3: Cross multiply
   1,384.56x = 2,070.63 × 1,255.37
4. Step 4: Simplify right side
   1,384.56x = 2,599,396.43
5. Step 5: Solve for x
   x = 2,599,396.43/1,384.56
6. Step 6: Final answer
   x = 1,877.42