Finding the Fourth Proportional to 119,438.67, 164,820.37 and 64,991.05

Step by Step Solution

1. Step 1: Write the proportion equation
   119,438.67 : 164,820.37 = 64,991.05 : x
2. Step 2: Convert to fraction form
   119,438.67/164,820.37 = 64,991.05/x
3. Step 3: Cross multiply
   119,438.67x = 164,820.37 × 64,991.05
4. Step 4: Simplify right side
   119,438.67x = 10,711,848,907.69
5. Step 5: Solve for x
   x = 10,711,848,907.69/119,438.67
6. Step 6: Final answer
   x = 89,684.93