Finding the Fourth Proportional to 99,692.48, 137,621.69 and 61,458.86

Step by Step Solution

1. Step 1: Write the proportion equation
   99,692.48 : 137,621.69 = 61,458.86 : x
2. Step 2: Convert to fraction form
   99,692.48/137,621.69 = 61,458.86/x
3. Step 3: Cross multiply
   99,692.48x = 137,621.69 × 61,458.86
4. Step 4: Simplify right side
   99,692.48x = 8,458,071,183.27
5. Step 5: Solve for x
   x = 8,458,071,183.27/99,692.48
6. Step 6: Final answer
   x = 84,841.62