Finding the Fourth Proportional to 78,102, 117,188.70 and 42,510

Step by Step Solution

1. Step 1: Write the proportion equation
   78,102 : 117,188.70 = 42,510 : x
2. Step 2: Convert to fraction form
   78,102/117,188.70 = 42,510/x
3. Step 3: Cross multiply
   78,102x = 117,188.70 × 42,510
4. Step 4: Simplify right side
   78,102x = 4,981,691,637
5. Step 5: Solve for x
   x = 4,981,691,637/78,102
6. Step 6: Final answer
   x = 63,784.43