Finding the Fourth Proportional to 1,290.69, 1,935.55 and 468.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,290.69 : 1,935.55 = 468.76 : x
2. Step 2: Convert to fraction form
   1,290.69/1,935.55 = 468.76/x
3. Step 3: Cross multiply
   1,290.69x = 1,935.55 × 468.76
4. Step 4: Simplify right side
   1,290.69x = 907,308.42
5. Step 5: Solve for x
   x = 907,308.42/1,290.69
6. Step 6: Final answer
   x = 702.96