Finding the Fourth Proportional to 142,128,077.90, 196,138,099.62 and 83,391,742.35

Step by Step Solution

1. Step 1: Write the proportion equation
   142,128,077.90 : 196,138,099.62 = 83,391,742.35 : x
2. Step 2: Convert to fraction form
   142,128,077.90/196,138,099.62 = 83,391,742.35/x
3. Step 3: Cross multiply
   142,128,077.90x = 196,138,099.62 × 83,391,742.35
4. Step 4: Simplify right side
   142,128,077.90x = 16,356,297,868,529,672
5. Step 5: Solve for x
   x = 16,356,297,868,529,672/142,128,077.90
6. Step 6: Final answer
   x = 115,081,397.78