Finding the Fourth Proportional to 342,155.58, 513,200.38 and 105,434.70

Step by Step Solution

1. Step 1: Write the proportion equation
   342,155.58 : 513,200.38 = 105,434.70 : x
2. Step 2: Convert to fraction form
   342,155.58/513,200.38 = 105,434.70/x
3. Step 3: Cross multiply
   342,155.58x = 513,200.38 × 105,434.70
4. Step 4: Simplify right side
   342,155.58x = 54,109,128,105.19
5. Step 5: Solve for x
   x = 54,109,128,105.19/342,155.58
6. Step 6: Final answer
   x = 158,141.88