Finding the Fourth Proportional to 162,783.30, 243,980.55 and 83,856.90

Step by Step Solution

1. Step 1: Write the proportion equation
   162,783.30 : 243,980.55 = 83,856.90 : x
2. Step 2: Convert to fraction form
   162,783.30/243,980.55 = 83,856.90/x
3. Step 3: Cross multiply
   162,783.30x = 243,980.55 × 83,856.90
4. Step 4: Simplify right side
   162,783.30x = 20,459,452,583.30
5. Step 5: Solve for x
   x = 20,459,452,583.30/162,783.30
6. Step 6: Final answer
   x = 125,685.21