Finding the Fourth Proportional to 1,385.48, 2,074.06 and 898.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,385.48 : 2,074.06 = 898.76 : x
2. Step 2: Convert to fraction form
   1,385.48/2,074.06 = 898.76/x
3. Step 3: Cross multiply
   1,385.48x = 2,074.06 × 898.76
4. Step 4: Simplify right side
   1,385.48x = 1,864,082.17
5. Step 5: Solve for x
   x = 1,864,082.17/1,385.48
6. Step 6: Final answer
   x = 1,345.44