Finding the Fourth Proportional to 1,929.67, 2,877.56 and 1,912.13

Step by Step Solution

1. Step 1: Write the proportion equation
   1,929.67 : 2,877.56 = 1,912.13 : x
2. Step 2: Convert to fraction form
   1,929.67/2,877.56 = 1,912.13/x
3. Step 3: Cross multiply
   1,929.67x = 2,877.56 × 1,912.13
4. Step 4: Simplify right side
   1,929.67x = 5,502,262.82
5. Step 5: Solve for x
   x = 5,502,262.82/1,929.67
6. Step 6: Final answer
   x = 2,851.40