Finding the Fourth Proportional to 78,111.17, 107,792.88 and 42,300.36

Step by Step Solution

1. Step 1: Write the proportion equation
   78,111.17 : 107,792.88 = 42,300.36 : x
2. Step 2: Convert to fraction form
   78,111.17/107,792.88 = 42,300.36/x
3. Step 3: Cross multiply
   78,111.17x = 107,792.88 × 42,300.36
4. Step 4: Simplify right side
   78,111.17x = 4,559,677,470.81
5. Step 5: Solve for x
   x = 4,559,677,470.81/78,111.17
6. Step 6: Final answer
   x = 58,374.21