Finding the Fourth Proportional to 78,155.90, 107,854.99 and 42,346.88

Step by Step Solution

1. Step 1: Write the proportion equation
   78,155.90 : 107,854.99 = 42,346.88 : x
2. Step 2: Convert to fraction form
   78,155.90/107,854.99 = 42,346.88/x
3. Step 3: Cross multiply
   78,155.90x = 107,854.99 × 42,346.88
4. Step 4: Simplify right side
   78,155.90x = 4,567,321,673.79
5. Step 5: Solve for x
   x = 4,567,321,673.79/78,155.90
6. Step 6: Final answer
   x = 58,438.61