Finding the Fourth Proportional to 70,648.55, 97,397.56 and 56,356.85

Step by Step Solution

1. Step 1: Write the proportion equation
   70,648.55 : 97,397.56 = 56,356.85 : x
2. Step 2: Convert to fraction form
   70,648.55/97,397.56 = 56,356.85/x
3. Step 3: Cross multiply
   70,648.55x = 97,397.56 × 56,356.85
4. Step 4: Simplify right side
   70,648.55x = 5,489,019,781.89
5. Step 5: Solve for x
   x = 5,489,019,781.89/70,648.55
6. Step 6: Final answer
   x = 77,694.73