Finding the Fourth Proportional to 81,356.39, 112,312.59 and 51,158.34

Step by Step Solution

1. Step 1: Write the proportion equation
   81,356.39 : 112,312.59 = 51,158.34 : x
2. Step 2: Convert to fraction form
   81,356.39/112,312.59 = 51,158.34/x
3. Step 3: Cross multiply
   81,356.39x = 112,312.59 × 51,158.34
4. Step 4: Simplify right side
   81,356.39x = 5,745,725,665.50
5. Step 5: Solve for x
   x = 5,745,725,665.50/81,356.39
6. Step 6: Final answer
   x = 70,624.15