Finding the Fourth Proportional to 78,400.06, 108,192.17 and 42,590.07

Step by Step Solution

1. Step 1: Write the proportion equation
   78,400.06 : 108,192.17 = 42,590.07 : x
2. Step 2: Convert to fraction form
   78,400.06/108,192.17 = 42,590.07/x
3. Step 3: Cross multiply
   78,400.06x = 108,192.17 × 42,590.07
4. Step 4: Simplify right side
   78,400.06x = 4,607,912,200.23
5. Step 5: Solve for x
   x = 4,607,912,200.23/78,400.06
6. Step 6: Final answer
   x = 58,774.35