Finding the Fourth Proportional to 70,467.72, 105,670.86 and 26,661

Step by Step Solution

1. Step 1: Write the proportion equation
   70,467.72 : 105,670.86 = 26,661 : x
2. Step 2: Convert to fraction form
   70,467.72/105,670.86 = 26,661/x
3. Step 3: Cross multiply
   70,467.72x = 105,670.86 × 26,661
4. Step 4: Simplify right side
   70,467.72x = 2,817,290,798.46
5. Step 5: Solve for x
   x = 2,817,290,798.46/70,467.72
6. Step 6: Final answer
   x = 39,979.88