Finding the Fourth Proportional to 1,976.42, 2,979.63 and 1,870.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,976.42 : 2,979.63 = 1,870.58 : x
2. Step 2: Convert to fraction form
   1,976.42/2,979.63 = 1,870.58/x
3. Step 3: Cross multiply
   1,976.42x = 2,979.63 × 1,870.58
4. Step 4: Simplify right side
   1,976.42x = 5,573,636.29
5. Step 5: Solve for x
   x = 5,573,636.29/1,976.42
6. Step 6: Final answer
   x = 2,820.07