Finding the Fourth Proportional to 112,488.18, 155,264.49 and 70,021.50

Step by Step Solution

1. Step 1: Write the proportion equation
   112,488.18 : 155,264.49 = 70,021.50 : x
2. Step 2: Convert to fraction form
   112,488.18/155,264.49 = 70,021.50/x
3. Step 3: Cross multiply
   112,488.18x = 155,264.49 × 70,021.50
4. Step 4: Simplify right side
   112,488.18x = 10,871,852,486.54
5. Step 5: Solve for x
   x = 10,871,852,486.54/112,488.18
6. Step 6: Final answer
   x = 96,648.84