Finding the Fourth Proportional to 61,196.79, 91,616.87 and 45,471.53

Step by Step Solution

1. Step 1: Write the proportion equation
   61,196.79 : 91,616.87 = 45,471.53 : x
2. Step 2: Convert to fraction form
   61,196.79/91,616.87 = 45,471.53/x
3. Step 3: Cross multiply
   61,196.79x = 91,616.87 × 45,471.53
4. Step 4: Simplify right side
   61,196.79x = 4,165,959,080.09
5. Step 5: Solve for x
   x = 4,165,959,080.09/61,196.79
6. Step 6: Final answer
   x = 68,074.80