Finding the Fourth Proportional to 72,406.20, 99,916.44 and 42,196.44

Step by Step Solution

1. Step 1: Write the proportion equation
   72,406.20 : 99,916.44 = 42,196.44 : x
2. Step 2: Convert to fraction form
   72,406.20/99,916.44 = 42,196.44/x
3. Step 3: Cross multiply
   72,406.20x = 99,916.44 × 42,196.44
4. Step 4: Simplify right side
   72,406.20x = 4,216,118,065.47
5. Step 5: Solve for x
   x = 4,216,118,065.47/72,406.20
6. Step 6: Final answer
   x = 58,228.69