Finding the Fourth Proportional to 2,077.21, 3,117.30 and 1,298.35

Step by Step Solution

1. Step 1: Write the proportion equation
   2,077.21 : 3,117.30 = 1,298.35 : x
2. Step 2: Convert to fraction form
   2,077.21/3,117.30 = 1,298.35/x
3. Step 3: Cross multiply
   2,077.21x = 3,117.30 × 1,298.35
4. Step 4: Simplify right side
   2,077.21x = 4,047,346.46
5. Step 5: Solve for x
   x = 4,047,346.46/2,077.21
6. Step 6: Final answer
   x = 1,948.45