Finding the Fourth Proportional to 72,463, 108,421.98 and 42,894.76

Step by Step Solution

1. Step 1: Write the proportion equation
   72,463 : 108,421.98 = 42,894.76 : x
2. Step 2: Convert to fraction form
   72,463/108,421.98 = 42,894.76/x
3. Step 3: Cross multiply
   72,463x = 108,421.98 × 42,894.76
4. Step 4: Simplify right side
   72,463x = 4,650,734,810.82
5. Step 5: Solve for x
   x = 4,650,734,810.82/72,463
6. Step 6: Final answer
   x = 64,180.82