Finding the Fourth Proportional to 129,978.90, 194,929.47 and 67,615.38

Step by Step Solution

1. Step 1: Write the proportion equation
   129,978.90 : 194,929.47 = 67,615.38 : x
2. Step 2: Convert to fraction form
   129,978.90/194,929.47 = 67,615.38/x
3. Step 3: Cross multiply
   129,978.90x = 194,929.47 × 67,615.38
4. Step 4: Simplify right side
   129,978.90x = 13,180,230,187.25
5. Step 5: Solve for x
   x = 13,180,230,187.25/129,978.90
6. Step 6: Final answer
   x = 101,402.84