Finding the Fourth Proportional to 72,509,915.34, 99,873,069.36 and 55,732,571.42

Step by Step Solution

1. Step 1: Write the proportion equation
   72,509,915.34 : 99,873,069.36 = 55,732,571.42 : x
2. Step 2: Convert to fraction form
   72,509,915.34/99,873,069.36 = 55,732,571.42/x
3. Step 3: Cross multiply
   72,509,915.34x = 99,873,069.36 × 55,732,571.42
4. Step 4: Simplify right side
   72,509,915.34x = 5,566,182,971,040,814
5. Step 5: Solve for x
   x = 5,566,182,971,040,814/72,509,915.34
6. Step 6: Final answer
   x = 76,764,438.97