Finding the Fourth Proportional to 1,429.96, 1,973.42 and 870.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,429.96 : 1,973.42 = 870.34 : x
2. Step 2: Convert to fraction form
   1,429.96/1,973.42 = 870.34/x
3. Step 3: Cross multiply
   1,429.96x = 1,973.42 × 870.34
4. Step 4: Simplify right side
   1,429.96x = 1,717,532.14
5. Step 5: Solve for x
   x = 1,717,532.14/1,429.96
6. Step 6: Final answer
   x = 1,201.11