Finding the Fourth Proportional to 81,874.78, 122,346.02 and 61,478.56

Step by Step Solution

1. Step 1: Write the proportion equation
   81,874.78 : 122,346.02 = 61,478.56 : x
2. Step 2: Convert to fraction form
   81,874.78/122,346.02 = 61,478.56/x
3. Step 3: Cross multiply
   81,874.78x = 122,346.02 × 61,478.56
4. Step 4: Simplify right side
   81,874.78x = 7,521,657,131.33
5. Step 5: Solve for x
   x = 7,521,657,131.33/81,874.78
6. Step 6: Final answer
   x = 91,867.81