Finding the Fourth Proportional to 78,670.18, 108,564.52 and 42,860.08

Step by Step Solution

1. Step 1: Write the proportion equation
   78,670.18 : 108,564.52 = 42,860.08 : x
2. Step 2: Convert to fraction form
   78,670.18/108,564.52 = 42,860.08/x
3. Step 3: Cross multiply
   78,670.18x = 108,564.52 × 42,860.08
4. Step 4: Simplify right side
   78,670.18x = 4,653,084,012.36
5. Step 5: Solve for x
   x = 4,653,084,012.36/78,670.18
6. Step 6: Final answer
   x = 59,146.73