Finding the Fourth Proportional to 99,769.51, 137,732.72 and 77,057.52

Step by Step Solution

1. Step 1: Write the proportion equation
   99,769.51 : 137,732.72 = 77,057.52 : x
2. Step 2: Convert to fraction form
   99,769.51/137,732.72 = 77,057.52/x
3. Step 3: Cross multiply
   99,769.51x = 137,732.72 × 77,057.52
4. Step 4: Simplify right side
   99,769.51x = 10,613,341,826.05
5. Step 5: Solve for x
   x = 10,613,341,826.05/99,769.51
6. Step 6: Final answer
   x = 106,378.61