Finding the Fourth Proportional to 81,690.78, 122,552.56 and 37,305.60

Step by Step Solution

1. Step 1: Write the proportion equation
   81,690.78 : 122,552.56 = 37,305.60 : x
2. Step 2: Convert to fraction form
   81,690.78/122,552.56 = 37,305.60/x
3. Step 3: Cross multiply
   81,690.78x = 122,552.56 × 37,305.60
4. Step 4: Simplify right side
   81,690.78x = 4,571,896,782.34
5. Step 5: Solve for x
   x = 4,571,896,782.34/81,690.78
6. Step 6: Final answer
   x = 55,965.88