Finding the Fourth Proportional to 99,075.94, 136,727.16 and 56,638.42

Step by Step Solution

1. Step 1: Write the proportion equation
   99,075.94 : 136,727.16 = 56,638.42 : x
2. Step 2: Convert to fraction form
   99,075.94/136,727.16 = 56,638.42/x
3. Step 3: Cross multiply
   99,075.94x = 136,727.16 × 56,638.42
4. Step 4: Simplify right side
   99,075.94x = 7,744,010,313.49
5. Step 5: Solve for x
   x = 7,744,010,313.49/99,075.94
6. Step 6: Final answer
   x = 78,162.37