Finding the Fourth Proportional to 55,978.60, 83,822.10 and 53,354.20

Step by Step Solution

1. Step 1: Write the proportion equation
   55,978.60 : 83,822.10 = 53,354.20 : x
2. Step 2: Convert to fraction form
   55,978.60/83,822.10 = 53,354.20/x
3. Step 3: Cross multiply
   55,978.60x = 83,822.10 × 53,354.20
4. Step 4: Simplify right side
   55,978.60x = 4,472,261,087.82
5. Step 5: Solve for x
   x = 4,472,261,087.82/55,978.60
6. Step 6: Final answer
   x = 79,892.34