Finding the Fourth Proportional to 65,618.67, 90,530.07 and 42,970.58

Step by Step Solution

1. Step 1: Write the proportion equation
   65,618.67 : 90,530.07 = 42,970.58 : x
2. Step 2: Convert to fraction form
   65,618.67/90,530.07 = 42,970.58/x
3. Step 3: Cross multiply
   65,618.67x = 90,530.07 × 42,970.58
4. Step 4: Simplify right side
   65,618.67x = 3,890,129,162.69
5. Step 5: Solve for x
   x = 3,890,129,162.69/65,618.67
6. Step 6: Final answer
   x = 59,283.88