Finding the Fourth Proportional to 118,142,025.89, 163,038,605.58 and 65,218,608.19

Step by Step Solution

1. Step 1: Write the proportion equation
   118,142,025.89 : 163,038,605.58 = 65,218,608.19 : x
2. Step 2: Convert to fraction form
   118,142,025.89/163,038,605.58 = 65,218,608.19/x
3. Step 3: Cross multiply
   118,142,025.89x = 163,038,605.58 × 65,218,608.19
4. Step 4: Simplify right side
   118,142,025.89x = 10,633,150,937,369,766
5. Step 5: Solve for x
   x = 10,633,150,937,369,766/118,142,025.89
6. Step 6: Final answer
   x = 90,003,120.04