Finding the Fourth Proportional to 70,989.40, 97,978.98 and 42,704.20

Step by Step Solution

1. Step 1: Write the proportion equation
   70,989.40 : 97,978.98 = 42,704.20 : x
2. Step 2: Convert to fraction form
   70,989.40/97,978.98 = 42,704.20/x
3. Step 3: Cross multiply
   70,989.40x = 97,978.98 × 42,704.20
4. Step 4: Simplify right side
   70,989.40x = 4,184,113,957.72
5. Step 5: Solve for x
   x = 4,184,113,957.72/70,989.40
6. Step 6: Final answer
   x = 58,939.98