Finding the Fourth Proportional to 72,285, 99,814.86 and 45,472.38

Step by Step Solution

1. Step 1: Write the proportion equation
   72,285 : 99,814.86 = 45,472.38 : x
2. Step 2: Convert to fraction form
   72,285/99,814.86 = 45,472.38/x
3. Step 3: Cross multiply
   72,285x = 99,814.86 × 45,472.38
4. Step 4: Simplify right side
   72,285x = 4,538,819,243.57
5. Step 5: Solve for x
   x = 4,538,819,243.57/72,285
6. Step 6: Final answer
   x = 62,790.61