Finding the Fourth Proportional to 70,128.86, 96,779.07 and 42,909.48

Step by Step Solution

1. Step 1: Write the proportion equation
   70,128.86 : 96,779.07 = 42,909.48 : x
2. Step 2: Convert to fraction form
   70,128.86/96,779.07 = 42,909.48/x
3. Step 3: Cross multiply
   70,128.86x = 96,779.07 × 42,909.48
4. Step 4: Simplify right side
   70,128.86x = 4,152,739,568.58
5. Step 5: Solve for x
   x = 4,152,739,568.58/70,128.86
6. Step 6: Final answer
   x = 59,215.85