Finding the Fourth Proportional to 72,338.42, 99,875.77 and 45,155.89

Step by Step Solution

1. Step 1: Write the proportion equation
   72,338.42 : 99,875.77 = 45,155.89 : x
2. Step 2: Convert to fraction form
   72,338.42/99,875.77 = 45,155.89/x
3. Step 3: Cross multiply
   72,338.42x = 99,875.77 × 45,155.89
4. Step 4: Simplify right side
   72,338.42x = 4,509,979,626.69
5. Step 5: Solve for x
   x = 4,509,979,626.69/72,338.42
6. Step 6: Final answer
   x = 62,345.56