Finding the Fourth Proportional to 105,428.56, 158,141.92 and 43,055.28

Step by Step Solution

1. Step 1: Write the proportion equation
   105,428.56 : 158,141.92 = 43,055.28 : x
2. Step 2: Convert to fraction form
   105,428.56/158,141.92 = 43,055.28/x
3. Step 3: Cross multiply
   105,428.56x = 158,141.92 × 43,055.28
4. Step 4: Simplify right side
   105,428.56x = 6,808,844,645.34
5. Step 5: Solve for x
   x = 6,808,844,645.34/105,428.56
6. Step 6: Final answer
   x = 64,582.54