Finding the Fourth Proportional to 129,777.83, 179,051.46 and 72,407.86

Step by Step Solution

1. Step 1: Write the proportion equation
   129,777.83 : 179,051.46 = 72,407.86 : x
2. Step 2: Convert to fraction form
   129,777.83/179,051.46 = 72,407.86/x
3. Step 3: Cross multiply
   129,777.83x = 179,051.46 × 72,407.86
4. Step 4: Simplify right side
   129,777.83x = 12,964,733,048.48
5. Step 5: Solve for x
   x = 12,964,733,048.48/129,777.83
6. Step 6: Final answer
   x = 99,899.44