Finding the Fourth Proportional to 139,881.80, 209,884.71 and 73,306.10

Step by Step Solution

1. Step 1: Write the proportion equation
   139,881.80 : 209,884.71 = 73,306.10 : x
2. Step 2: Convert to fraction form
   139,881.80/209,884.71 = 73,306.10/x
3. Step 3: Cross multiply
   139,881.80x = 209,884.71 × 73,306.10
4. Step 4: Simplify right side
   139,881.80x = 15,385,829,539.73
5. Step 5: Solve for x
   x = 15,385,829,539.73/139,881.80
6. Step 6: Final answer
   x = 109,991.65