Finding the Fourth Proportional to 117,061,511.56, 161,533,112.69 and 64,840,790.30

Step by Step Solution

1. Step 1: Write the proportion equation
   117,061,511.56 : 161,533,112.69 = 64,840,790.30 : x
2. Step 2: Convert to fraction form
   117,061,511.56/161,533,112.69 = 64,840,790.30/x
3. Step 3: Cross multiply
   117,061,511.56x = 161,533,112.69 × 64,840,790.30
4. Step 4: Simplify right side
   117,061,511.56x = 10,473,934,685,792,996
5. Step 5: Solve for x
   x = 10,473,934,685,792,996/117,061,511.56
6. Step 6: Final answer
   x = 89,473,769.36