Finding the Fourth Proportional to 90,079.50, 124,338.87 and 56,545.50

Step by Step Solution

1. Step 1: Write the proportion equation
   90,079.50 : 124,338.87 = 56,545.50 : x
2. Step 2: Convert to fraction form
   90,079.50/124,338.87 = 56,545.50/x
3. Step 3: Cross multiply
   90,079.50x = 124,338.87 × 56,545.50
4. Step 4: Simplify right side
   90,079.50x = 7,030,803,573.59
5. Step 5: Solve for x
   x = 7,030,803,573.59/90,079.50
6. Step 6: Final answer
   x = 78,051.09