Finding the Fourth Proportional to 2,312.18, 3,467.34 and 977.43

Step by Step Solution

1. Step 1: Write the proportion equation
   2,312.18 : 3,467.34 = 977.43 : x
2. Step 2: Convert to fraction form
   2,312.18/3,467.34 = 977.43/x
3. Step 3: Cross multiply
   2,312.18x = 3,467.34 × 977.43
4. Step 4: Simplify right side
   2,312.18x = 3,389,095.14
5. Step 5: Solve for x
   x = 3,389,095.14/2,312.18
6. Step 6: Final answer
   x = 1,465.76