Finding the Fourth Proportional to 1,061.76, 1,464.93 and 619.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,061.76 : 1,464.93 = 619.60 : x
2. Step 2: Convert to fraction form
   1,061.76/1,464.93 = 619.60/x
3. Step 3: Cross multiply
   1,061.76x = 1,464.93 × 619.60
4. Step 4: Simplify right side
   1,061.76x = 907,670.63
5. Step 5: Solve for x
   x = 907,670.63/1,061.76
6. Step 6: Final answer
   x = 854.87