Finding the Fourth Proportional to 72,128,762.73, 99,537,776.87 and 39,089,010.15

Step by Step Solution

1. Step 1: Write the proportion equation
   72,128,762.73 : 99,537,776.87 = 39,089,010.15 : x
2. Step 2: Convert to fraction form
   72,128,762.73/99,537,776.87 = 39,089,010.15/x
3. Step 3: Cross multiply
   72,128,762.73x = 99,537,776.87 × 39,089,010.15
4. Step 4: Simplify right side
   72,128,762.73x = 3,890,833,170,014,360
5. Step 5: Solve for x
   x = 3,890,833,170,014,360/72,128,762.73
6. Step 6: Final answer
   x = 53,942,879.69