Finding the Fourth Proportional to 90,495.30, 124,768.71 and 64,684.74

Step by Step Solution

1. Step 1: Write the proportion equation
   90,495.30 : 124,768.71 = 64,684.74 : x
2. Step 2: Convert to fraction form
   90,495.30/124,768.71 = 64,684.74/x
3. Step 3: Cross multiply
   90,495.30x = 124,768.71 × 64,684.74
4. Step 4: Simplify right side
   90,495.30x = 8,070,631,566.49
5. Step 5: Solve for x
   x = 8,070,631,566.49/90,495.30
6. Step 6: Final answer
   x = 89,182.88