Finding the Fourth Proportional to 78,002.13, 107,643.02 and 42,192.03

Step by Step Solution

1. Step 1: Write the proportion equation
   78,002.13 : 107,643.02 = 42,192.03 : x
2. Step 2: Convert to fraction form
   78,002.13/107,643.02 = 42,192.03/x
3. Step 3: Cross multiply
   78,002.13x = 107,643.02 × 42,192.03
4. Step 4: Simplify right side
   78,002.13x = 4,541,677,318.17
5. Step 5: Solve for x
   x = 4,541,677,318.17/78,002.13
6. Step 6: Final answer
   x = 58,225.04