Finding the Fourth Proportional to 123,776.02, 170,814.73 and 72,779.54

Step by Step Solution

1. Step 1: Write the proportion equation
   123,776.02 : 170,814.73 = 72,779.54 : x
2. Step 2: Convert to fraction form
   123,776.02/170,814.73 = 72,779.54/x
3. Step 3: Cross multiply
   123,776.02x = 170,814.73 × 72,779.54
4. Step 4: Simplify right side
   123,776.02x = 12,431,817,474.62
5. Step 5: Solve for x
   x = 12,431,817,474.62/123,776.02
6. Step 6: Final answer
   x = 100,438.01