Finding the Fourth Proportional to 90,312, 124,601.76 and 58,505.28

Step by Step Solution

1. Step 1: Write the proportion equation
   90,312 : 124,601.76 = 58,505.28 : x
2. Step 2: Convert to fraction form
   90,312/124,601.76 = 58,505.28/x
3. Step 3: Cross multiply
   90,312x = 124,601.76 × 58,505.28
4. Step 4: Simplify right side
   90,312x = 7,289,860,857.29
5. Step 5: Solve for x
   x = 7,289,860,857.29/90,312
6. Step 6: Final answer
   x = 80,718.63