Finding the Fourth Proportional to 1,780.01, 2,667.59 and 1,129.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,780.01 : 2,667.59 = 1,129.58 : x
2. Step 2: Convert to fraction form
   1,780.01/2,667.59 = 1,129.58/x
3. Step 3: Cross multiply
   1,780.01x = 2,667.59 × 1,129.58
4. Step 4: Simplify right side
   1,780.01x = 3,013,256.31
5. Step 5: Solve for x
   x = 3,013,256.31/1,780.01
6. Step 6: Final answer
   x = 1,692.83