Finding the Fourth Proportional to 72,355.31, 99,899.09 and 45,172.82

Step by Step Solution

1. Step 1: Write the proportion equation
   72,355.31 : 99,899.09 = 45,172.82 : x
2. Step 2: Convert to fraction form
   72,355.31/99,899.09 = 45,172.82/x
3. Step 3: Cross multiply
   72,355.31x = 99,899.09 × 45,172.82
4. Step 4: Simplify right side
   72,355.31x = 4,512,723,804.02
5. Step 5: Solve for x
   x = 4,512,723,804.02/72,355.31
6. Step 6: Final answer
   x = 62,368.94