Finding the Fourth Proportional to 72,406.67, 99,917.07 and 42,196.91

Step by Step Solution

1. Step 1: Write the proportion equation
   72,406.67 : 99,917.07 = 42,196.91 : x
2. Step 2: Convert to fraction form
   72,406.67/99,917.07 = 42,196.91/x
3. Step 3: Cross multiply
   72,406.67x = 99,917.07 × 42,196.91
4. Step 4: Simplify right side
   72,406.67x = 4,216,191,110.67
5. Step 5: Solve for x
   x = 4,216,191,110.67/72,406.67
6. Step 6: Final answer
   x = 58,229.32