Finding the Fourth Proportional to 81,401.40, 122,138.55 and 37,005.30

Step by Step Solution

1. Step 1: Write the proportion equation
   81,401.40 : 122,138.55 = 37,005.30 : x
2. Step 2: Convert to fraction form
   81,401.40/122,138.55 = 37,005.30/x
3. Step 3: Cross multiply
   81,401.40x = 122,138.55 × 37,005.30
4. Step 4: Simplify right side
   81,401.40x = 4,519,773,684.32
5. Step 5: Solve for x
   x = 4,519,773,684.32/81,401.40
6. Step 6: Final answer
   x = 55,524.52