Finding the Fourth Proportional to 102,142.39, 140,898.89 and 61,296.06

Step by Step Solution

1. Step 1: Write the proportion equation
   102,142.39 : 140,898.89 = 61,296.06 : x
2. Step 2: Convert to fraction form
   102,142.39/140,898.89 = 61,296.06/x
3. Step 3: Cross multiply
   102,142.39x = 140,898.89 × 61,296.06
4. Step 4: Simplify right side
   102,142.39x = 8,636,546,110.88
5. Step 5: Solve for x
   x = 8,636,546,110.88/102,142.39
6. Step 6: Final answer
   x = 84,553.99