Finding the Fourth Proportional to 72,636.96, 108,955.98 and 20,045.28

Step by Step Solution

1. Step 1: Write the proportion equation
   72,636.96 : 108,955.98 = 20,045.28 : x
2. Step 2: Convert to fraction form
   72,636.96/108,955.98 = 20,045.28/x
3. Step 3: Cross multiply
   72,636.96x = 108,955.98 × 20,045.28
4. Step 4: Simplify right side
   72,636.96x = 2,184,053,126.77
5. Step 5: Solve for x
   x = 2,184,053,126.77/72,636.96
6. Step 6: Final answer
   x = 30,068.07