Finding the Fourth Proportional to 1,380.96, 2,070.03 and 1,298.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,380.96 : 2,070.03 = 1,298.94 : x
2. Step 2: Convert to fraction form
   1,380.96/2,070.03 = 1,298.94/x
3. Step 3: Cross multiply
   1,380.96x = 2,070.03 × 1,298.94
4. Step 4: Simplify right side
   1,380.96x = 2,688,844.77
5. Step 5: Solve for x
   x = 2,688,844.77/1,380.96
6. Step 6: Final answer
   x = 1,947.08