Finding the Fourth Proportional to 518,498,061.10, 778,045,690.05 and 195,613,657.90

Step by Step Solution

1. Step 1: Write the proportion equation
   518,498,061.10 : 778,045,690.05 = 195,613,657.90 : x
2. Step 2: Convert to fraction form
   518,498,061.10/778,045,690.05 = 195,613,657.90/x
3. Step 3: Cross multiply
   518,498,061.10x = 778,045,690.05 × 195,613,657.90
4. Step 4: Simplify right side
   518,498,061.10x = 152,196,363,444,010,144
5. Step 5: Solve for x
   x = 152,196,363,444,010,144/518,498,061.10
6. Step 6: Final answer
   x = 293,533,139.01