Finding the Fourth Proportional to 137,019.99, 189,063.40 and 76,571.31

Step by Step Solution

1. Step 1: Write the proportion equation
   137,019.99 : 189,063.40 = 76,571.31 : x
2. Step 2: Convert to fraction form
   137,019.99/189,063.40 = 76,571.31/x
3. Step 3: Cross multiply
   137,019.99x = 189,063.40 × 76,571.31
4. Step 4: Simplify right side
   137,019.99x = 14,476,832,211.05
5. Step 5: Solve for x
   x = 14,476,832,211.05/137,019.99
6. Step 6: Final answer
   x = 105,654.89