Finding the Fourth Proportional to 129,131.39, 178,200.06 and 71,770.84

Step by Step Solution

1. Step 1: Write the proportion equation
   129,131.39 : 178,200.06 = 71,770.84 : x
2. Step 2: Convert to fraction form
   129,131.39/178,200.06 = 71,770.84/x
3. Step 3: Cross multiply
   129,131.39x = 178,200.06 × 71,770.84
4. Step 4: Simplify right side
   129,131.39x = 12,789,567,994.25
5. Step 5: Solve for x
   x = 12,789,567,994.25/129,131.39
6. Step 6: Final answer
   x = 99,043.06