Finding the Fourth Proportional to 1,994.06, 2,983.80 and 1,172.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,994.06 : 2,983.80 = 1,172.72 : x
2. Step 2: Convert to fraction form
   1,994.06/2,983.80 = 1,172.72/x
3. Step 3: Cross multiply
   1,994.06x = 2,983.80 × 1,172.72
4. Step 4: Simplify right side
   1,994.06x = 3,499,161.94
5. Step 5: Solve for x
   x = 3,499,161.94/1,994.06
6. Step 6: Final answer
   x = 1,754.79