Finding the Fourth Proportional to 487,211,152.50, 730,859,690.55 and 137,460,280.50

Step by Step Solution

1. Step 1: Write the proportion equation
   487,211,152.50 : 730,859,690.55 = 137,460,280.50 : x
2. Step 2: Convert to fraction form
   487,211,152.50/730,859,690.55 = 137,460,280.50/x
3. Step 3: Cross multiply
   487,211,152.50x = 730,859,690.55 × 137,460,280.50
4. Step 4: Simplify right side
   487,211,152.50x = 100,464,178,065,491,904
5. Step 5: Solve for x
   x = 100,464,178,065,491,904/487,211,152.50
6. Step 6: Final answer
   x = 206,202,541.86