Finding the Fourth Proportional to 92,768.96, 139,039.43 and 42,779.67

Step by Step Solution

1. Step 1: Write the proportion equation
   92,768.96 : 139,039.43 = 42,779.67 : x
2. Step 2: Convert to fraction form
   92,768.96/139,039.43 = 42,779.67/x
3. Step 3: Cross multiply
   92,768.96x = 139,039.43 × 42,779.67
4. Step 4: Simplify right side
   92,768.96x = 5,948,060,718.49
5. Step 5: Solve for x
   x = 5,948,060,718.49/92,768.96
6. Step 6: Final answer
   x = 64,116.93