Finding the Fourth Proportional to 78,137.55, 107,830.34 and 42,327.56

Step by Step Solution

1. Step 1: Write the proportion equation
   78,137.55 : 107,830.34 = 42,327.56 : x
2. Step 2: Convert to fraction form
   78,137.55/107,830.34 = 42,327.56/x
3. Step 3: Cross multiply
   78,137.55x = 107,830.34 × 42,327.56
4. Step 4: Simplify right side
   78,137.55x = 4,564,195,186.17
5. Step 5: Solve for x
   x = 4,564,195,186.17/78,137.55
6. Step 6: Final answer
   x = 58,412.32