Finding the Fourth Proportional to 1,385.06, 1,911.25 and 764.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,385.06 : 1,911.25 = 764.02 : x
2. Step 2: Convert to fraction form
   1,385.06/1,911.25 = 764.02/x
3. Step 3: Cross multiply
   1,385.06x = 1,911.25 × 764.02
4. Step 4: Simplify right side
   1,385.06x = 1,460,233.23
5. Step 5: Solve for x
   x = 1,460,233.23/1,385.06
6. Step 6: Final answer
   x = 1,054.27