Finding the Fourth Proportional to 109,858.59, 151,603.49 and 64,540.71

Step by Step Solution

1. Step 1: Write the proportion equation
   109,858.59 : 151,603.49 = 64,540.71 : x
2. Step 2: Convert to fraction form
   109,858.59/151,603.49 = 64,540.71/x
3. Step 3: Cross multiply
   109,858.59x = 151,603.49 × 64,540.71
4. Step 4: Simplify right side
   109,858.59x = 9,784,596,560.37
5. Step 5: Solve for x
   x = 9,784,596,560.37/109,858.59
6. Step 6: Final answer
   x = 89,065.38