Finding the Fourth Proportional to 151,569,090.72, 209,165,493.60 and 81,954,453.60

Step by Step Solution

1. Step 1: Write the proportion equation
   151,569,090.72 : 209,165,493.60 = 81,954,453.60 : x
2. Step 2: Convert to fraction form
   151,569,090.72/209,165,493.60 = 81,954,453.60/x
3. Step 3: Cross multiply
   151,569,090.72x = 209,165,493.60 × 81,954,453.60
4. Step 4: Simplify right side
   151,569,090.72x = 17,142,043,739,962,296
5. Step 5: Solve for x
   x = 17,142,043,739,962,296/151,569,090.72
6. Step 6: Final answer
   x = 113,097,226.21