Finding the Fourth Proportional to 78,501,533.94, 108,313,585.56 and 65,990,156.49

Step by Step Solution

1. Step 1: Write the proportion equation
   78,501,533.94 : 108,313,585.56 = 65,990,156.49 : x
2. Step 2: Convert to fraction form
   78,501,533.94/108,313,585.56 = 65,990,156.49/x
3. Step 3: Cross multiply
   78,501,533.94x = 108,313,585.56 × 65,990,156.49
4. Step 4: Simplify right side
   78,501,533.94x = 7,147,630,461,097,405
5. Step 5: Solve for x
   x = 7,147,630,461,097,405/78,501,533.94
6. Step 6: Final answer
   x = 91,050,838.15