Finding the Fourth Proportional to 72,356.47, 99,858.08 and 42,144.55

Step by Step Solution

1. Step 1: Write the proportion equation
   72,356.47 : 99,858.08 = 42,144.55 : x
2. Step 2: Convert to fraction form
   72,356.47/99,858.08 = 42,144.55/x
3. Step 3: Cross multiply
   72,356.47x = 99,858.08 × 42,144.55
4. Step 4: Simplify right side
   72,356.47x = 4,208,473,845.46
5. Step 5: Solve for x
   x = 4,208,473,845.46/72,356.47
6. Step 6: Final answer
   x = 58,163.06