Finding the Fourth Proportional to 2,111.93, 2,914.68 and 1,272.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,111.93 : 2,914.68 = 1,272.90 : x
2. Step 2: Convert to fraction form
   2,111.93/2,914.68 = 1,272.90/x
3. Step 3: Cross multiply
   2,111.93x = 2,914.68 × 1,272.90
4. Step 4: Simplify right side
   2,111.93x = 3,710,096.17
5. Step 5: Solve for x
   x = 3,710,096.17/2,111.93
6. Step 6: Final answer
   x = 1,756.74