Finding the Fourth Proportional to 55,459.88, 83,111.18 and 42,921.54

Step by Step Solution

1. Step 1: Write the proportion equation
   55,459.88 : 83,111.18 = 42,921.54 : x
2. Step 2: Convert to fraction form
   55,459.88/83,111.18 = 42,921.54/x
3. Step 3: Cross multiply
   55,459.88x = 83,111.18 × 42,921.54
4. Step 4: Simplify right side
   55,459.88x = 3,567,259,836.82
5. Step 5: Solve for x
   x = 3,567,259,836.82/55,459.88
6. Step 6: Final answer
   x = 64,321.45