Finding the Fourth Proportional to 78,622.21, 108,498.57 and 42,812.47

Step by Step Solution

1. Step 1: Write the proportion equation
   78,622.21 : 108,498.57 = 42,812.47 : x
2. Step 2: Convert to fraction form
   78,622.21/108,498.57 = 42,812.47/x
3. Step 3: Cross multiply
   78,622.21x = 108,498.57 × 42,812.47
4. Step 4: Simplify right side
   78,622.21x = 4,645,091,773.17
5. Step 5: Solve for x
   x = 4,645,091,773.17/78,622.21
6. Step 6: Final answer
   x = 59,081.17