Finding the Fourth Proportional to 1,975.42, 2,978.12 and 1,869.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,975.42 : 2,978.12 = 1,869.58 : x
2. Step 2: Convert to fraction form
   1,975.42/2,978.12 = 1,869.58/x
3. Step 3: Cross multiply
   1,975.42x = 2,978.12 × 1,869.58
4. Step 4: Simplify right side
   1,975.42x = 5,567,833.59
5. Step 5: Solve for x
   x = 5,567,833.59/1,975.42
6. Step 6: Final answer
   x = 2,818.56