Finding the Fourth Proportional to 220,481,082.42, 330,499,303.74 and 138,658,435.89

Step by Step Solution

1. Step 1: Write the proportion equation
   220,481,082.42 : 330,499,303.74 = 138,658,435.89 : x
2. Step 2: Convert to fraction form
   220,481,082.42/330,499,303.74 = 138,658,435.89/x
3. Step 3: Cross multiply
   220,481,082.42x = 330,499,303.74 × 138,658,435.89
4. Step 4: Simplify right side
   220,481,082.42x = 45,826,516,519,322,424
5. Step 5: Solve for x
   x = 45,826,516,519,322,424/220,481,082.42
6. Step 6: Final answer
   x = 207,847,838.99