Finding the Fourth Proportional to 72,090.54, 108,128.52 and 19,505.34

Step by Step Solution

1. Step 1: Write the proportion equation
   72,090.54 : 108,128.52 = 19,505.34 : x
2. Step 2: Convert to fraction form
   72,090.54/108,128.52 = 19,505.34/x
3. Step 3: Cross multiply
   72,090.54x = 108,128.52 × 19,505.34
4. Step 4: Simplify right side
   72,090.54x = 2,109,083,546.30
5. Step 5: Solve for x
   x = 2,109,083,546.30/72,090.54
6. Step 6: Final answer
   x = 29,256.04