Finding the Fourth Proportional to 99,513.92, 149,279.31 and 28,436.96

Step by Step Solution

1. Step 1: Write the proportion equation
   99,513.92 : 149,279.31 = 28,436.96 : x
2. Step 2: Convert to fraction form
   99,513.92/149,279.31 = 28,436.96/x
3. Step 3: Cross multiply
   99,513.92x = 149,279.31 × 28,436.96
4. Step 4: Simplify right side
   99,513.92x = 4,245,049,020.90
5. Step 5: Solve for x
   x = 4,245,049,020.90/99,513.92
6. Step 6: Final answer
   x = 42,657.84