Finding the Fourth Proportional to 78,215.32, 108,026.22 and 53,021.08

Step by Step Solution

1. Step 1: Write the proportion equation
   78,215.32 : 108,026.22 = 53,021.08 : x
2. Step 2: Convert to fraction form
   78,215.32/108,026.22 = 53,021.08/x
3. Step 3: Cross multiply
   78,215.32x = 108,026.22 × 53,021.08
4. Step 4: Simplify right side
   78,215.32x = 5,727,666,852.72
5. Step 5: Solve for x
   x = 5,727,666,852.72/78,215.32
6. Step 6: Final answer
   x = 73,229.48