Finding the Fourth Proportional to 72,401.06, 108,587.01 and 19,815.86

Step by Step Solution

1. Step 1: Write the proportion equation
   72,401.06 : 108,587.01 = 19,815.86 : x
2. Step 2: Convert to fraction form
   72,401.06/108,587.01 = 19,815.86/x
3. Step 3: Cross multiply
   72,401.06x = 108,587.01 × 19,815.86
4. Step 4: Simplify right side
   72,401.06x = 2,151,744,987.98
5. Step 5: Solve for x
   x = 2,151,744,987.98/72,401.06
6. Step 6: Final answer
   x = 29,719.80