Finding the Fourth Proportional to 2,015.47, 2,999.91 and 1,970.11

Step by Step Solution

1. Step 1: Write the proportion equation
   2,015.47 : 2,999.91 = 1,970.11 : x
2. Step 2: Convert to fraction form
   2,015.47/2,999.91 = 1,970.11/x
3. Step 3: Cross multiply
   2,015.47x = 2,999.91 × 1,970.11
4. Step 4: Simplify right side
   2,015.47x = 5,910,152.69
5. Step 5: Solve for x
   x = 5,910,152.69/2,015.47
6. Step 6: Final answer
   x = 2,932.39