Finding the Fourth Proportional to 1,356.32, 1,870.80 and 832.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,356.32 : 1,870.80 = 832.16 : x
2. Step 2: Convert to fraction form
   1,356.32/1,870.80 = 832.16/x
3. Step 3: Cross multiply
   1,356.32x = 1,870.80 × 832.16
4. Step 4: Simplify right side
   1,356.32x = 1,556,804.93
5. Step 5: Solve for x
   x = 1,556,804.93/1,356.32
6. Step 6: Final answer
   x = 1,147.82