Finding the Fourth Proportional to 139,581,640.76, 209,372,723.58 and 57,610,606.28

Step by Step Solution

1. Step 1: Write the proportion equation
   139,581,640.76 : 209,372,723.58 = 57,610,606.28 : x
2. Step 2: Convert to fraction form
   139,581,640.76/209,372,723.58 = 57,610,606.28/x
3. Step 3: Cross multiply
   139,581,640.76x = 209,372,723.58 × 57,610,606.28
4. Step 4: Simplify right side
   139,581,640.76x = 12,062,089,544,874,516
5. Step 5: Solve for x
   x = 12,062,089,544,874,516/139,581,640.76
6. Step 6: Final answer
   x = 86,416,017.74