Finding the Fourth Proportional to 78,148.84, 107,845.30 and 42,339

Step by Step Solution

1. Step 1: Write the proportion equation
   78,148.84 : 107,845.30 = 42,339 : x
2. Step 2: Convert to fraction form
   78,148.84/107,845.30 = 42,339/x
3. Step 3: Cross multiply
   78,148.84x = 107,845.30 × 42,339
4. Step 4: Simplify right side
   78,148.84x = 4,566,062,156.70
5. Step 5: Solve for x
   x = 4,566,062,156.70/78,148.84
6. Step 6: Final answer
   x = 58,427.77