Finding the Fourth Proportional to 231,947,408.79, 320,068,492.88 and 136,562,861.79

Step by Step Solution

1. Step 1: Write the proportion equation
   231,947,408.79 : 320,068,492.88 = 136,562,861.79 : x
2. Step 2: Convert to fraction form
   231,947,408.79/320,068,492.88 = 136,562,861.79/x
3. Step 3: Cross multiply
   231,947,408.79x = 320,068,492.88 × 136,562,861.79
4. Step 4: Simplify right side
   231,947,408.79x = 43,709,469,355,822,224
5. Step 5: Solve for x
   x = 43,709,469,355,822,224/231,947,408.79
6. Step 6: Final answer
   x = 188,445,603.18