Finding the Fourth Proportional to 1,385.01, 1,911.51 and 912.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,385.01 : 1,911.51 = 912.82 : x
2. Step 2: Convert to fraction form
   1,385.01/1,911.51 = 912.82/x
3. Step 3: Cross multiply
   1,385.01x = 1,911.51 × 912.82
4. Step 4: Simplify right side
   1,385.01x = 1,744,859.99
5. Step 5: Solve for x
   x = 1,744,859.99/1,385.01
6. Step 6: Final answer
   x = 1,259.82