Finding the Fourth Proportional to 139,899.89, 193,061.88 and 76,237.70

Step by Step Solution

1. Step 1: Write the proportion equation
   139,899.89 : 193,061.88 = 76,237.70 : x
2. Step 2: Convert to fraction form
   139,899.89/193,061.88 = 76,237.70/x
3. Step 3: Cross multiply
   139,899.89x = 193,061.88 × 76,237.70
4. Step 4: Simplify right side
   139,899.89x = 14,718,592,723.57
5. Step 5: Solve for x
   x = 14,718,592,723.57/139,899.89
6. Step 6: Final answer
   x = 105,208.04