Finding the Fourth Proportional to 86,978.86, 119,959.64 and 61,222.67

Step by Step Solution

1. Step 1: Write the proportion equation
   86,978.86 : 119,959.64 = 61,222.67 : x
2. Step 2: Convert to fraction form
   86,978.86/119,959.64 = 61,222.67/x
3. Step 3: Cross multiply
   86,978.86x = 119,959.64 × 61,222.67
4. Step 4: Simplify right side
   86,978.86x = 7,344,249,006.30
5. Step 5: Solve for x
   x = 7,344,249,006.30/86,978.86
6. Step 6: Final answer
   x = 84,437.17