Finding the Fourth Proportional to 69,139.72, 103,627.56 and 61,168.10

Step by Step Solution

1. Step 1: Write the proportion equation
   69,139.72 : 103,627.56 = 61,168.10 : x
2. Step 2: Convert to fraction form
   69,139.72/103,627.56 = 61,168.10/x
3. Step 3: Cross multiply
   69,139.72x = 103,627.56 × 61,168.10
4. Step 4: Simplify right side
   69,139.72x = 6,338,700,952.84
5. Step 5: Solve for x
   x = 6,338,700,952.84/69,139.72
6. Step 6: Final answer
   x = 91,679.59