Finding the Fourth Proportional to 70,619.15, 105,830.31 and 53,068.48

Step by Step Solution

1. Step 1: Write the proportion equation
   70,619.15 : 105,830.31 = 53,068.48 : x
2. Step 2: Convert to fraction form
   70,619.15/105,830.31 = 53,068.48/x
3. Step 3: Cross multiply
   70,619.15x = 105,830.31 × 53,068.48
4. Step 4: Simplify right side
   70,619.15x = 5,616,253,689.63
5. Step 5: Solve for x
   x = 5,616,253,689.63/70,619.15
6. Step 6: Final answer
   x = 79,528.76