Finding the Fourth Proportional to 1,917.31, 2,875.93 and 1,051.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,917.31 : 2,875.93 = 1,051.15 : x
2. Step 2: Convert to fraction form
   1,917.31/2,875.93 = 1,051.15/x
3. Step 3: Cross multiply
   1,917.31x = 2,875.93 × 1,051.15
4. Step 4: Simplify right side
   1,917.31x = 3,023,033.82
5. Step 5: Solve for x
   x = 3,023,033.82/1,917.31
6. Step 6: Final answer
   x = 1,576.71