Finding the Fourth Proportional to 78,796.62, 108,738.32 and 42,985.87

Step by Step Solution

1. Step 1: Write the proportion equation
   78,796.62 : 108,738.32 = 42,985.87 : x
2. Step 2: Convert to fraction form
   78,796.62/108,738.32 = 42,985.87/x
3. Step 3: Cross multiply
   78,796.62x = 108,738.32 × 42,985.87
4. Step 4: Simplify right side
   78,796.62x = 4,674,210,800.76
5. Step 5: Solve for x
   x = 4,674,210,800.76/78,796.62
6. Step 6: Final answer
   x = 59,319.94