Finding the Fourth Proportional to 139,853.22, 209,785.59 and 73,256.10

Step by Step Solution

1. Step 1: Write the proportion equation
   139,853.22 : 209,785.59 = 73,256.10 : x
2. Step 2: Convert to fraction form
   139,853.22/209,785.59 = 73,256.10/x
3. Step 3: Cross multiply
   139,853.22x = 209,785.59 × 73,256.10
4. Step 4: Simplify right side
   139,853.22x = 15,368,074,159.60
5. Step 5: Solve for x
   x = 15,368,074,159.60/139,853.22
6. Step 6: Final answer
   x = 109,887.17