Finding the Fourth Proportional to 78,111.40, 107,792.40 and 42,301.12

Step by Step Solution

1. Step 1: Write the proportion equation
   78,111.40 : 107,792.40 = 42,301.12 : x
2. Step 2: Convert to fraction form
   78,111.40/107,792.40 = 42,301.12/x
3. Step 3: Cross multiply
   78,111.40x = 107,792.40 × 42,301.12
4. Step 4: Simplify right side
   78,111.40x = 4,559,739,247.49
5. Step 5: Solve for x
   x = 4,559,739,247.49/78,111.40
6. Step 6: Final answer
   x = 58,374.82