Finding the Fourth Proportional to 81,830.72, 122,064.57 and 80,476.00

Step by Step Solution

1. Step 1: Write the proportion equation
   81,830.72 : 122,064.57 = 80,476.00 : x
2. Step 2: Convert to fraction form
   81,830.72/122,064.57 = 80,476.00/x
3. Step 3: Cross multiply
   81,830.72x = 122,064.57 × 80,476.00
4. Step 4: Simplify right side
   81,830.72x = 9,823,268,030.16
5. Step 5: Solve for x
   x = 9,823,268,030.16/81,830.72
6. Step 6: Final answer
   x = 120,043.77