Finding the Fourth Proportional to 78,155.65, 107,854.64 and 42,346.63

Step by Step Solution

1. Step 1: Write the proportion equation
   78,155.65 : 107,854.64 = 42,346.63 : x
2. Step 2: Convert to fraction form
   78,155.65/107,854.64 = 42,346.63/x
3. Step 3: Cross multiply
   78,155.65x = 107,854.64 × 42,346.63
4. Step 4: Simplify right side
   78,155.65x = 4,567,280,100.46
5. Step 5: Solve for x
   x = 4,567,280,100.46/78,155.65
6. Step 6: Final answer
   x = 58,438.26