Finding the Fourth Proportional to 118,139.56, 163,036.50 and 64,429

Step by Step Solution

1. Step 1: Write the proportion equation
   118,139.56 : 163,036.50 = 64,429 : x
2. Step 2: Convert to fraction form
   118,139.56/163,036.50 = 64,429/x
3. Step 3: Cross multiply
   118,139.56x = 163,036.50 × 64,429
4. Step 4: Simplify right side
   118,139.56x = 10,504,278,658.50
5. Step 5: Solve for x
   x = 10,504,278,658.50/118,139.56
6. Step 6: Final answer
   x = 88,914.15