Finding the Fourth Proportional to 257,040,662.37, 354,716,533.89 and 139,566,219.81

Step by Step Solution

1. Step 1: Write the proportion equation
   257,040,662.37 : 354,716,533.89 = 139,566,219.81 : x
2. Step 2: Convert to fraction form
   257,040,662.37/354,716,533.89 = 139,566,219.81/x
3. Step 3: Cross multiply
   257,040,662.37x = 354,716,533.89 × 139,566,219.81
4. Step 4: Simplify right side
   257,040,662.37x = 49,506,445,739,133,056
5. Step 5: Solve for x
   x = 49,506,445,739,133,056/257,040,662.37
6. Step 6: Final answer
   x = 192,601,611.29