Finding the Fourth Proportional to 78,002.84, 107,643.79 and 42,192.74

Step by Step Solution

1. Step 1: Write the proportion equation
   78,002.84 : 107,643.79 = 42,192.74 : x
2. Step 2: Convert to fraction form
   78,002.84/107,643.79 = 42,192.74/x
3. Step 3: Cross multiply
   78,002.84x = 107,643.79 × 42,192.74
4. Step 4: Simplify right side
   78,002.84x = 4,541,786,444.08
5. Step 5: Solve for x
   x = 4,541,786,444.08/78,002.84
6. Step 6: Final answer
   x = 58,225.91