Finding the Fourth Proportional to 81,862.56, 122,670.72 and 55,476

Step by Step Solution

1. Step 1: Write the proportion equation
   81,862.56 : 122,670.72 = 55,476 : x
2. Step 2: Convert to fraction form
   81,862.56/122,670.72 = 55,476/x
3. Step 3: Cross multiply
   81,862.56x = 122,670.72 × 55,476
4. Step 4: Simplify right side
   81,862.56x = 6,805,280,862.72
5. Step 5: Solve for x
   x = 6,805,280,862.72/81,862.56
6. Step 6: Final answer
   x = 83,130.56