Finding the Fourth Proportional to 72,009,402, 99,373,907.88 and 39,413,654.16

Step by Step Solution

1. Step 1: Write the proportion equation
   72,009,402 : 99,373,907.88 = 39,413,654.16 : x
2. Step 2: Convert to fraction form
   72,009,402/99,373,907.88 = 39,413,654.16/x
3. Step 3: Cross multiply
   72,009,402x = 99,373,907.88 × 39,413,654.16
4. Step 4: Simplify right side
   72,009,402x = 3,916,688,837,710,018
5. Step 5: Solve for x
   x = 3,916,688,837,710,018/72,009,402
6. Step 6: Final answer
   x = 54,391,353.48