Finding the Fourth Proportional to 2,971.32, 4,456.95 and 780.01

Step by Step Solution

1. Step 1: Write the proportion equation
   2,971.32 : 4,456.95 = 780.01 : x
2. Step 2: Convert to fraction form
   2,971.32/4,456.95 = 780.01/x
3. Step 3: Cross multiply
   2,971.32x = 4,456.95 × 780.01
4. Step 4: Simplify right side
   2,971.32x = 3,476,465.57
5. Step 5: Solve for x
   x = 3,476,465.57/2,971.32
6. Step 6: Final answer
   x = 1,170.01