Finding the Fourth Proportional to 2,152.47, 2,970.56 and 1,312.95

Step by Step Solution

1. Step 1: Write the proportion equation
   2,152.47 : 2,970.56 = 1,312.95 : x
2. Step 2: Convert to fraction form
   2,152.47/2,970.56 = 1,312.95/x
3. Step 3: Cross multiply
   2,152.47x = 2,970.56 × 1,312.95
4. Step 4: Simplify right side
   2,152.47x = 3,900,187.08
5. Step 5: Solve for x
   x = 3,900,187.08/2,152.47
6. Step 6: Final answer
   x = 1,811.96