Finding the Fourth Proportional to 72,445.41, 99,977.28 and 42,225.87

Step by Step Solution

1. Step 1: Write the proportion equation
   72,445.41 : 99,977.28 = 42,225.87 : x
2. Step 2: Convert to fraction form
   72,445.41/99,977.28 = 42,225.87/x
3. Step 3: Cross multiply
   72,445.41x = 99,977.28 × 42,225.87
4. Step 4: Simplify right side
   72,445.41x = 4,221,627,628.23
5. Step 5: Solve for x
   x = 4,221,627,628.23/72,445.41
6. Step 6: Final answer
   x = 58,273.22