Finding the Fourth Proportional to 81,538.78, 112,475.72 and 51,276.10

Step by Step Solution

1. Step 1: Write the proportion equation
   81,538.78 : 112,475.72 = 51,276.10 : x
2. Step 2: Convert to fraction form
   81,538.78/112,475.72 = 51,276.10/x
3. Step 3: Cross multiply
   81,538.78x = 112,475.72 × 51,276.10
4. Step 4: Simplify right side
   81,538.78x = 5,767,316,266.29
5. Step 5: Solve for x
   x = 5,767,316,266.29/81,538.78
6. Step 6: Final answer
   x = 70,730.96