Finding the Fourth Proportional to 53,978, 74,499.72 and 31,622

Step by Step Solution

1. Step 1: Write the proportion equation
   53,978 : 74,499.72 = 31,622 : x
2. Step 2: Convert to fraction form
   53,978/74,499.72 = 31,622/x
3. Step 3: Cross multiply
   53,978x = 74,499.72 × 31,622
4. Step 4: Simplify right side
   53,978x = 2,355,830,145.84
5. Step 5: Solve for x
   x = 2,355,830,145.84/53,978
6. Step 6: Final answer
   x = 43,644.27