Finding the Fourth Proportional to 99,446.74, 149,105.82 and 42,557.78

Step by Step Solution

1. Step 1: Write the proportion equation
   99,446.74 : 149,105.82 = 42,557.78 : x
2. Step 2: Convert to fraction form
   99,446.74/149,105.82 = 42,557.78/x
3. Step 3: Cross multiply
   99,446.74x = 149,105.82 × 42,557.78
4. Step 4: Simplify right side
   99,446.74x = 6,345,612,684.28
5. Step 5: Solve for x
   x = 6,345,612,684.28/99,446.74
6. Step 6: Final answer
   x = 63,809.16