Finding the Fourth Proportional to 72,320.33, 99,790.17 and 45,443.81

Step by Step Solution

1. Step 1: Write the proportion equation
   72,320.33 : 99,790.17 = 45,443.81 : x
2. Step 2: Convert to fraction form
   72,320.33/99,790.17 = 45,443.81/x
3. Step 3: Cross multiply
   72,320.33x = 99,790.17 × 45,443.81
4. Step 4: Simplify right side
   72,320.33x = 4,534,845,026.40
5. Step 5: Solve for x
   x = 4,534,845,026.40/72,320.33
6. Step 6: Final answer
   x = 62,704.99