Finding the Fourth Proportional to 72,300.16, 99,773.18 and 40,031.69

Step by Step Solution

1. Step 1: Write the proportion equation
   72,300.16 : 99,773.18 = 40,031.69 : x
2. Step 2: Convert to fraction form
   72,300.16/99,773.18 = 40,031.69/x
3. Step 3: Cross multiply
   72,300.16x = 99,773.18 × 40,031.69
4. Step 4: Simplify right side
   72,300.16x = 3,994,089,012.07
5. Step 5: Solve for x
   x = 3,994,089,012.07/72,300.16
6. Step 6: Final answer
   x = 55,243.16