Finding the Fourth Proportional to 83,188, 124,856.88 and 56,469.28

Step by Step Solution

1. Step 1: Write the proportion equation
   83,188 : 124,856.88 = 56,469.28 : x
2. Step 2: Convert to fraction form
   83,188/124,856.88 = 56,469.28/x
3. Step 3: Cross multiply
   83,188x = 124,856.88 × 56,469.28
4. Step 4: Simplify right side
   83,188x = 7,050,578,116.65
5. Step 5: Solve for x
   x = 7,050,578,116.65/83,188
6. Step 6: Final answer
   x = 84,754.75