Finding the Fourth Proportional to 72,757, 100,389.54 and 42,536.40

Step by Step Solution

1. Step 1: Write the proportion equation
   72,757 : 100,389.54 = 42,536.40 : x
2. Step 2: Convert to fraction form
   72,757/100,389.54 = 42,536.40/x
3. Step 3: Cross multiply
   72,757x = 100,389.54 × 42,536.40
4. Step 4: Simplify right side
   72,757x = 4,270,209,629.26
5. Step 5: Solve for x
   x = 4,270,209,629.26/72,757
6. Step 6: Final answer
   x = 58,691.39