Finding the Fourth Proportional to 72,009,557.42, 99,372,429.33 and 38,969,090.42

Step by Step Solution

1. Step 1: Write the proportion equation
   72,009,557.42 : 99,372,429.33 = 38,969,090.42 : x
2. Step 2: Convert to fraction form
   72,009,557.42/99,372,429.33 = 38,969,090.42/x
3. Step 3: Cross multiply
   72,009,557.42x = 99,372,429.33 × 38,969,090.42
4. Step 4: Simplify right side
   72,009,557.42x = 3,872,453,183,815,830
5. Step 5: Solve for x
   x = 3,872,453,183,815,830/72,009,557.42
6. Step 6: Final answer
   x = 53,776,933.54