Finding the Fourth Proportional to 128,926.37, 177,921.46 and 72,341.93

Step by Step Solution

1. Step 1: Write the proportion equation
   128,926.37 : 177,921.46 = 72,341.93 : x
2. Step 2: Convert to fraction form
   128,926.37/177,921.46 = 72,341.93/x
3. Step 3: Cross multiply
   128,926.37x = 177,921.46 × 72,341.93
4. Step 4: Simplify right side
   128,926.37x = 12,871,182,340.05
5. Step 5: Solve for x
   x = 12,871,182,340.05/128,926.37
6. Step 6: Final answer
   x = 99,833.59