Finding the Fourth Proportional to 102,128.67, 140,880.04 and 61,282.23

Step by Step Solution

1. Step 1: Write the proportion equation
   102,128.67 : 140,880.04 = 61,282.23 : x
2. Step 2: Convert to fraction form
   102,128.67/140,880.04 = 61,282.23/x
3. Step 3: Cross multiply
   102,128.67x = 140,880.04 × 61,282.23
4. Step 4: Simplify right side
   102,128.67x = 8,633,443,013.69
5. Step 5: Solve for x
   x = 8,633,443,013.69/102,128.67
6. Step 6: Final answer
   x = 84,534.96