Finding the Fourth Proportional to 1,428.08, 1,967.82 and 1,054.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,428.08 : 1,967.82 = 1,054.48 : x
2. Step 2: Convert to fraction form
   1,428.08/1,967.82 = 1,054.48/x
3. Step 3: Cross multiply
   1,428.08x = 1,967.82 × 1,054.48
4. Step 4: Simplify right side
   1,428.08x = 2,075,026.83
5. Step 5: Solve for x
   x = 2,075,026.83/1,428.08
6. Step 6: Final answer
   x = 1,453.02