Finding the Fourth Proportional to 77,793.04, 107,499.72 and 63,640.72

Step by Step Solution

1. Step 1: Write the proportion equation
   77,793.04 : 107,499.72 = 63,640.72 : x
2. Step 2: Convert to fraction form
   77,793.04/107,499.72 = 63,640.72/x
3. Step 3: Cross multiply
   77,793.04x = 107,499.72 × 63,640.72
4. Step 4: Simplify right side
   77,793.04x = 6,841,359,580.60
5. Step 5: Solve for x
   x = 6,841,359,580.60/77,793.04
6. Step 6: Final answer
   x = 87,943.08