Finding the Fourth Proportional to 123,978.84, 171,089.92 and 70,263.40

Step by Step Solution

1. Step 1: Write the proportion equation
   123,978.84 : 171,089.92 = 70,263.40 : x
2. Step 2: Convert to fraction form
   123,978.84/171,089.92 = 70,263.40/x
3. Step 3: Cross multiply
   123,978.84x = 171,089.92 × 70,263.40
4. Step 4: Simplify right side
   123,978.84x = 12,021,359,484.93
5. Step 5: Solve for x
   x = 12,021,359,484.93/123,978.84
6. Step 6: Final answer
   x = 96,962.99