Finding the Fourth Proportional to 142,146,902.42, 196,144,692.78 and 83,388,128.25

Step by Step Solution

1. Step 1: Write the proportion equation
   142,146,902.42 : 196,144,692.78 = 83,388,128.25 : x
2. Step 2: Convert to fraction form
   142,146,902.42/196,144,692.78 = 83,388,128.25/x
3. Step 3: Cross multiply
   142,146,902.42x = 196,144,692.78 × 83,388,128.25
4. Step 4: Simplify right side
   142,146,902.42x = 16,356,138,797,095,490
5. Step 5: Solve for x
   x = 16,356,138,797,095,490/142,146,902.42
6. Step 6: Final answer
   x = 115,065,038.48