Finding the Fourth Proportional to 103,415.82, 142,779.15 and 71,573.10

Step by Step Solution

1. Step 1: Write the proportion equation
   103,415.82 : 142,779.15 = 71,573.10 : x
2. Step 2: Convert to fraction form
   103,415.82/142,779.15 = 71,573.10/x
3. Step 3: Cross multiply
   103,415.82x = 142,779.15 × 71,573.10
4. Step 4: Simplify right side
   103,415.82x = 10,219,146,380.87
5. Step 5: Solve for x
   x = 10,219,146,380.87/103,415.82
6. Step 6: Final answer
   x = 98,816.08