Finding the Fourth Proportional to 73,991.58, 111,003.99 and 21,405.15

Step by Step Solution

1. Step 1: Write the proportion equation
   73,991.58 : 111,003.99 = 21,405.15 : x
2. Step 2: Convert to fraction form
   73,991.58/111,003.99 = 21,405.15/x
3. Step 3: Cross multiply
   73,991.58x = 111,003.99 × 21,405.15
4. Step 4: Simplify right side
   73,991.58x = 2,376,057,056.55
5. Step 5: Solve for x
   x = 2,376,057,056.55/73,991.58
6. Step 6: Final answer
   x = 32,112.53