Finding the Fourth Proportional to 139,523,389.38, 209,144,396.52 and 87,744,995.28

Step by Step Solution

1. Step 1: Write the proportion equation
   139,523,389.38 : 209,144,396.52 = 87,744,995.28 : x
2. Step 2: Convert to fraction form
   139,523,389.38/209,144,396.52 = 87,744,995.28/x
3. Step 3: Cross multiply
   139,523,389.38x = 209,144,396.52 × 87,744,995.28
4. Step 4: Simplify right side
   139,523,389.38x = 18,351,374,085,485,848
5. Step 5: Solve for x
   x = 18,351,374,085,485,848/139,523,389.38
6. Step 6: Final answer
   x = 131,529,015.79