Finding the Fourth Proportional to 69,141.72, 103,630.56 and 61,170.10

Step by Step Solution

1. Step 1: Write the proportion equation
   69,141.72 : 103,630.56 = 61,170.10 : x
2. Step 2: Convert to fraction form
   69,141.72/103,630.56 = 61,170.10/x
3. Step 3: Cross multiply
   69,141.72x = 103,630.56 × 61,170.10
4. Step 4: Simplify right side
   69,141.72x = 6,339,091,718.26
5. Step 5: Solve for x
   x = 6,339,091,718.26/69,141.72
6. Step 6: Final answer
   x = 91,682.59