Finding the Fourth Proportional to 1,429.88, 1,973.04 and 840.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,429.88 : 1,973.04 = 840.32 : x
2. Step 2: Convert to fraction form
   1,429.88/1,973.04 = 840.32/x
3. Step 3: Cross multiply
   1,429.88x = 1,973.04 × 840.32
4. Step 4: Simplify right side
   1,429.88x = 1,657,984.97
5. Step 5: Solve for x
   x = 1,657,984.97/1,429.88
6. Step 6: Final answer
   x = 1,159.53