Finding the Fourth Proportional to 139,978,859.70, 209,968,289.55 and 88,897,538.10

Step by Step Solution

1. Step 1: Write the proportion equation
   139,978,859.70 : 209,968,289.55 = 88,897,538.10 : x
2. Step 2: Convert to fraction form
   139,978,859.70/209,968,289.55 = 88,897,538.10/x
3. Step 3: Cross multiply
   139,978,859.70x = 209,968,289.55 × 88,897,538.10
4. Step 4: Simplify right side
   139,978,859.70x = 18,665,664,020,062,956
5. Step 5: Solve for x
   x = 18,665,664,020,062,956/139,978,859.70
6. Step 6: Final answer
   x = 133,346,307.15