Finding the Fourth Proportional to 99,667.57, 149,562.38 and 39,724.79

Step by Step Solution

1. Step 1: Write the proportion equation
   99,667.57 : 149,562.38 = 39,724.79 : x
2. Step 2: Convert to fraction form
   99,667.57/149,562.38 = 39,724.79/x
3. Step 3: Cross multiply
   99,667.57x = 149,562.38 × 39,724.79
4. Step 4: Simplify right side
   99,667.57x = 5,941,334,137.40
5. Step 5: Solve for x
   x = 5,941,334,137.40/99,667.57
6. Step 6: Final answer
   x = 59,611.51