Finding the Fourth Proportional to 78,659.74, 117,769.83 and 42,506.74

Step by Step Solution

1. Step 1: Write the proportion equation
   78,659.74 : 117,769.83 = 42,506.74 : x
2. Step 2: Convert to fraction form
   78,659.74/117,769.83 = 42,506.74/x
3. Step 3: Cross multiply
   78,659.74x = 117,769.83 × 42,506.74
4. Step 4: Simplify right side
   78,659.74x = 5,006,011,543.65
5. Step 5: Solve for x
   x = 5,006,011,543.65/78,659.74
6. Step 6: Final answer
   x = 63,641.34