Finding the Fourth Proportional to 72,406.42, 99,916.73 and 42,196.66

Step by Step Solution

1. Step 1: Write the proportion equation
   72,406.42 : 99,916.73 = 42,196.66 : x
2. Step 2: Convert to fraction form
   72,406.42/99,916.73 = 42,196.66/x
3. Step 3: Cross multiply
   72,406.42x = 99,916.73 × 42,196.66
4. Step 4: Simplify right side
   72,406.42x = 4,216,152,284.12
5. Step 5: Solve for x
   x = 4,216,152,284.12/72,406.42
6. Step 6: Final answer
   x = 58,228.98