Finding the Fourth Proportional to 92,859.67, 139,319.40 and 42,276.79

Step by Step Solution

1. Step 1: Write the proportion equation
   92,859.67 : 139,319.40 = 42,276.79 : x
2. Step 2: Convert to fraction form
   92,859.67/139,319.40 = 42,276.79/x
3. Step 3: Cross multiply
   92,859.67x = 139,319.40 × 42,276.79
4. Step 4: Simplify right side
   92,859.67x = 5,889,977,016.73
5. Step 5: Solve for x
   x = 5,889,977,016.73/92,859.67
6. Step 6: Final answer
   x = 63,428.80