Finding the Fourth Proportional to 137,570.69, 189,766.89 and 86,502.47

Step by Step Solution

1. Step 1: Write the proportion equation
   137,570.69 : 189,766.89 = 86,502.47 : x
2. Step 2: Convert to fraction form
   137,570.69/189,766.89 = 86,502.47/x
3. Step 3: Cross multiply
   137,570.69x = 189,766.89 × 86,502.47
4. Step 4: Simplify right side
   137,570.69x = 16,415,304,709.22
5. Step 5: Solve for x
   x = 16,415,304,709.22/137,570.69
6. Step 6: Final answer
   x = 119,322.69