Finding the Fourth Proportional to 142,278,068.57, 196,267,996.59 and 86,540,536.49

Step by Step Solution

1. Step 1: Write the proportion equation
   142,278,068.57 : 196,267,996.59 = 86,540,536.49 : x
2. Step 2: Convert to fraction form
   142,278,068.57/196,267,996.59 = 86,540,536.49/x
3. Step 3: Cross multiply
   142,278,068.57x = 196,267,996.59 × 86,540,536.49
4. Step 4: Simplify right side
   142,278,068.57x = 16,985,137,719,410,224
5. Step 5: Solve for x
   x = 16,985,137,719,410,224/142,278,068.57
6. Step 6: Final answer
   x = 119,379,872.74