Finding the Fourth Proportional to 1,064.76, 1,597.38 and 415.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,064.76 : 1,597.38 = 415.50 : x
2. Step 2: Convert to fraction form
   1,064.76/1,597.38 = 415.50/x
3. Step 3: Cross multiply
   1,064.76x = 1,597.38 × 415.50
4. Step 4: Simplify right side
   1,064.76x = 663,709.83
5. Step 5: Solve for x
   x = 663,709.83/1,064.76
6. Step 6: Final answer
   x = 623.34