Finding the Fourth Proportional to 78,145.34, 107,840.44 and 42,335.50

Step by Step Solution

1. Step 1: Write the proportion equation
   78,145.34 : 107,840.44 = 42,335.50 : x
2. Step 2: Convert to fraction form
   78,145.34/107,840.44 = 42,335.50/x
3. Step 3: Cross multiply
   78,145.34x = 107,840.44 × 42,335.50
4. Step 4: Simplify right side
   78,145.34x = 4,565,478,947.62
5. Step 5: Solve for x
   x = 4,565,478,947.62/78,145.34
6. Step 6: Final answer
   x = 58,422.92