Finding the Fourth Proportional to 105,571,898.56, 145,637,448.54 and 91,613,662.60

Step by Step Solution

1. Step 1: Write the proportion equation
   105,571,898.56 : 145,637,448.54 = 91,613,662.60 : x
2. Step 2: Convert to fraction form
   105,571,898.56/145,637,448.54 = 91,613,662.60/x
3. Step 3: Cross multiply
   105,571,898.56x = 145,637,448.54 × 91,613,662.60
4. Step 4: Simplify right side
   105,571,898.56x = 13,342,380,072,468,420
5. Step 5: Solve for x
   x = 13,342,380,072,468,420/105,571,898.56
6. Step 6: Final answer
   x = 126,381,927.90