Finding the Fourth Proportional to 149,123.82, 205,784.70 and 81,141.06

Step by Step Solution

1. Step 1: Write the proportion equation
   149,123.82 : 205,784.70 = 81,141.06 : x
2. Step 2: Convert to fraction form
   149,123.82/205,784.70 = 81,141.06/x
3. Step 3: Cross multiply
   149,123.82x = 205,784.70 × 81,141.06
4. Step 4: Simplify right side
   149,123.82x = 16,697,588,689.78
5. Step 5: Solve for x
   x = 16,697,588,689.78/149,123.82
6. Step 6: Final answer
   x = 111,971.30