Finding the Fourth Proportional to 99,074.94, 136,725.78 and 56,637.42

Step by Step Solution

1. Step 1: Write the proportion equation
   99,074.94 : 136,725.78 = 56,637.42 : x
2. Step 2: Convert to fraction form
   99,074.94/136,725.78 = 56,637.42/x
3. Step 3: Cross multiply
   99,074.94x = 136,725.78 × 56,637.42
4. Step 4: Simplify right side
   99,074.94x = 7,743,795,426.69
5. Step 5: Solve for x
   x = 7,743,795,426.69/99,074.94
6. Step 6: Final answer
   x = 78,160.99