Finding the Fourth Proportional to 72,383.20, 108,538.35 and 42,810.10

Step by Step Solution

1. Step 1: Write the proportion equation
   72,383.20 : 108,538.35 = 42,810.10 : x
2. Step 2: Convert to fraction form
   72,383.20/108,538.35 = 42,810.10/x
3. Step 3: Cross multiply
   72,383.20x = 108,538.35 × 42,810.10
4. Step 4: Simplify right side
   72,383.20x = 4,646,537,617.34
5. Step 5: Solve for x
   x = 4,646,537,617.34/72,383.20
6. Step 6: Final answer
   x = 64,193.59