Finding the Fourth Proportional to 38,970.50, 53,784.56 and 21,978.24

Step by Step Solution

1. Step 1: Write the proportion equation
   38,970.50 : 53,784.56 = 21,978.24 : x
2. Step 2: Convert to fraction form
   38,970.50/53,784.56 = 21,978.24/x
3. Step 3: Cross multiply
   38,970.50x = 53,784.56 × 21,978.24
4. Step 4: Simplify right side
   38,970.50x = 1,182,089,967.97
5. Step 5: Solve for x
   x = 1,182,089,967.97/38,970.50
6. Step 6: Final answer
   x = 30,332.94