Finding the Fourth Proportional to 109,807.10, 164,581.05 and 82,072.70

Step by Step Solution

1. Step 1: Write the proportion equation
   109,807.10 : 164,581.05 = 82,072.70 : x
2. Step 2: Convert to fraction form
   109,807.10/164,581.05 = 82,072.70/x
3. Step 3: Cross multiply
   109,807.10x = 164,581.05 × 82,072.70
4. Step 4: Simplify right side
   109,807.10x = 13,507,611,142.34
5. Step 5: Solve for x
   x = 13,507,611,142.34/109,807.10
6. Step 6: Final answer
   x = 123,012.18