Finding the Fourth Proportional to 117,686,139.56, 162,408,366.71 and 64,768,940.00

Step by Step Solution

1. Step 1: Write the proportion equation
   117,686,139.56 : 162,408,366.71 = 64,768,940.00 : x
2. Step 2: Convert to fraction form
   117,686,139.56/162,408,366.71 = 64,768,940.00/x
3. Step 3: Cross multiply
   117,686,139.56x = 162,408,366.71 × 64,768,940.00
4. Step 4: Simplify right side
   117,686,139.56x = 10,519,017,759,263,048
5. Step 5: Solve for x
   x = 10,519,017,759,263,048/117,686,139.56
6. Step 6: Final answer
   x = 89,381,959.49