Finding the Fourth Proportional to 70,779.72, 97,680.05 and 40,570.07

Step by Step Solution

1. Step 1: Write the proportion equation
   70,779.72 : 97,680.05 = 40,570.07 : x
2. Step 2: Convert to fraction form
   70,779.72/97,680.05 = 40,570.07/x
3. Step 3: Cross multiply
   70,779.72x = 97,680.05 × 40,570.07
4. Step 4: Simplify right side
   70,779.72x = 3,962,885,774.85
5. Step 5: Solve for x
   x = 3,962,885,774.85/70,779.72
6. Step 6: Final answer
   x = 55,989.00