Finding the Fourth Proportional to 65,304,239.12, 90,244,139.88 and 48,978,371.60

Step by Step Solution

1. Step 1: Write the proportion equation
   65,304,239.12 : 90,244,139.88 = 48,978,371.60 : x
2. Step 2: Convert to fraction form
   65,304,239.12/90,244,139.88 = 48,978,371.60/x
3. Step 3: Cross multiply
   65,304,239.12x = 90,244,139.88 × 48,978,371.60
4. Step 4: Simplify right side
   65,304,239.12x = 4,420,011,017,765,019.50
5. Step 5: Solve for x
   x = 4,420,011,017,765,019.50/65,304,239.12
6. Step 6: Final answer
   x = 67,683,370.59