Finding the Fourth Proportional to 72,150.66, 99,570.03 and 40,319.63

Step by Step Solution

1. Step 1: Write the proportion equation
   72,150.66 : 99,570.03 = 40,319.63 : x
2. Step 2: Convert to fraction form
   72,150.66/99,570.03 = 40,319.63/x
3. Step 3: Cross multiply
   72,150.66x = 99,570.03 × 40,319.63
4. Step 4: Simplify right side
   72,150.66x = 4,014,627,017.61
5. Step 5: Solve for x
   x = 4,014,627,017.61/72,150.66
6. Step 6: Final answer
   x = 55,642.28