Finding the Fourth Proportional to 1,354.17, 1,868.67 and 764.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,354.17 : 1,868.67 = 764.61 : x
2. Step 2: Convert to fraction form
   1,354.17/1,868.67 = 764.61/x
3. Step 3: Cross multiply
   1,354.17x = 1,868.67 × 764.61
4. Step 4: Simplify right side
   1,354.17x = 1,428,803.77
5. Step 5: Solve for x
   x = 1,428,803.77/1,354.17
6. Step 6: Final answer
   x = 1,055.11