Finding the Fourth Proportional to 1,917.02, 2,875.72 and 762.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,917.02 : 2,875.72 = 762.50 : x
2. Step 2: Convert to fraction form
   1,917.02/2,875.72 = 762.50/x
3. Step 3: Cross multiply
   1,917.02x = 2,875.72 × 762.50
4. Step 4: Simplify right side
   1,917.02x = 2,192,736.50
5. Step 5: Solve for x
   x = 2,192,736.50/1,917.02
6. Step 6: Final answer
   x = 1,143.83