Finding the Fourth Proportional to 2,152.31, 2,985.28 and 2,064.83

Step by Step Solution

1. Step 1: Write the proportion equation
   2,152.31 : 2,985.28 = 2,064.83 : x
2. Step 2: Convert to fraction form
   2,152.31/2,985.28 = 2,064.83/x
3. Step 3: Cross multiply
   2,152.31x = 2,985.28 × 2,064.83
4. Step 4: Simplify right side
   2,152.31x = 6,164,075.61
5. Step 5: Solve for x
   x = 6,164,075.61/2,152.31
6. Step 6: Final answer
   x = 2,863.94