Finding the Fourth Proportional to 78,110.40, 107,792.46 and 42,300.48

Step by Step Solution

1. Step 1: Write the proportion equation
   78,110.40 : 107,792.46 = 42,300.48 : x
2. Step 2: Convert to fraction form
   78,110.40/107,792.46 = 42,300.48/x
3. Step 3: Cross multiply
   78,110.40x = 107,792.46 × 42,300.48
4. Step 4: Simplify right side
   78,110.40x = 4,559,672,798.38
5. Step 5: Solve for x
   x = 4,559,672,798.38/78,110.40
6. Step 6: Final answer
   x = 58,374.72