Finding the Fourth Proportional to 78,697.42, 108,599.28 and 42,886.67

Step by Step Solution

1. Step 1: Write the proportion equation
   78,697.42 : 108,599.28 = 42,886.67 : x
2. Step 2: Convert to fraction form
   78,697.42/108,599.28 = 42,886.67/x
3. Step 3: Cross multiply
   78,697.42x = 108,599.28 × 42,886.67
4. Step 4: Simplify right side
   78,697.42x = 4,657,461,021.01
5. Step 5: Solve for x
   x = 4,657,461,021.01/78,697.42
6. Step 6: Final answer
   x = 59,181.87