Finding the Fourth Proportional to 72,689.58, 109,034.06 and 19,381.45

Step by Step Solution

1. Step 1: Write the proportion equation
   72,689.58 : 109,034.06 = 19,381.45 : x
2. Step 2: Convert to fraction form
   72,689.58/109,034.06 = 19,381.45/x
3. Step 3: Cross multiply
   72,689.58x = 109,034.06 × 19,381.45
4. Step 4: Simplify right side
   72,689.58x = 2,113,238,182.19
5. Step 5: Solve for x
   x = 2,113,238,182.19/72,689.58
6. Step 6: Final answer
   x = 29,072.09