Finding the Fourth Proportional to 108,643.05, 162,969.62 and 56,155.05

Step by Step Solution

1. Step 1: Write the proportion equation
   108,643.05 : 162,969.62 = 56,155.05 : x
2. Step 2: Convert to fraction form
   108,643.05/162,969.62 = 56,155.05/x
3. Step 3: Cross multiply
   108,643.05x = 162,969.62 × 56,155.05
4. Step 4: Simplify right side
   108,643.05x = 9,151,566,878.81
5. Step 5: Solve for x
   x = 9,151,566,878.81/108,643.05
6. Step 6: Final answer
   x = 84,235.18