Finding the Fourth Proportional to 67,870.47, 93,716.28 and 42,406.50

Step by Step Solution

1. Step 1: Write the proportion equation
   67,870.47 : 93,716.28 = 42,406.50 : x
2. Step 2: Convert to fraction form
   67,870.47/93,716.28 = 42,406.50/x
3. Step 3: Cross multiply
   67,870.47x = 93,716.28 × 42,406.50
4. Step 4: Simplify right side
   67,870.47x = 3,974,179,427.82
5. Step 5: Solve for x
   x = 3,974,179,427.82/67,870.47
6. Step 6: Final answer
   x = 58,555.35