Finding the Fourth Proportional to 1,402.64, 2,102.52 and 671.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,402.64 : 2,102.52 = 671.12 : x
2. Step 2: Convert to fraction form
   1,402.64/2,102.52 = 671.12/x
3. Step 3: Cross multiply
   1,402.64x = 2,102.52 × 671.12
4. Step 4: Simplify right side
   1,402.64x = 1,411,043.22
5. Step 5: Solve for x
   x = 1,411,043.22/1,402.64
6. Step 6: Final answer
   x = 1,005.99