Finding the Fourth Proportional to 89,803.88, 134,706.49 and 39,870.57

Step by Step Solution

1. Step 1: Write the proportion equation
   89,803.88 : 134,706.49 = 39,870.57 : x
2. Step 2: Convert to fraction form
   89,803.88/134,706.49 = 39,870.57/x
3. Step 3: Cross multiply
   89,803.88x = 134,706.49 × 39,870.57
4. Step 4: Simplify right side
   89,803.88x = 5,370,824,439.32
5. Step 5: Solve for x
   x = 5,370,824,439.32/89,803.88
6. Step 6: Final answer
   x = 59,806.15