Finding the Fourth Proportional to 72,317.34, 99,786.03 and 45,440.80

Step by Step Solution

1. Step 1: Write the proportion equation
   72,317.34 : 99,786.03 = 45,440.80 : x
2. Step 2: Convert to fraction form
   72,317.34/99,786.03 = 45,440.80/x
3. Step 3: Cross multiply
   72,317.34x = 99,786.03 × 45,440.80
4. Step 4: Simplify right side
   72,317.34x = 4,534,356,612.16
5. Step 5: Solve for x
   x = 4,534,356,612.16/72,317.34
6. Step 6: Final answer
   x = 62,700.82