Finding the Fourth Proportional to 72,245,156.35, 99,698,380.06 and 39,205,405.57

Step by Step Solution

1. Step 1: Write the proportion equation
   72,245,156.35 : 99,698,380.06 = 39,205,405.57 : x
2. Step 2: Convert to fraction form
   72,245,156.35/99,698,380.06 = 39,205,405.57/x
3. Step 3: Cross multiply
   72,245,156.35x = 99,698,380.06 × 39,205,405.57
4. Step 4: Simplify right side
   72,245,156.35x = 3,908,715,424,425,809
5. Step 5: Solve for x
   x = 3,908,715,424,425,809/72,245,156.35
6. Step 6: Final answer
   x = 54,103,494.58