Finding the Fourth Proportional to 570,740,840.32, 787,626,390.72 and 309,980,456.32

Step by Step Solution

1. Step 1: Write the proportion equation
   570,740,840.32 : 787,626,390.72 = 309,980,456.32 : x
2. Step 2: Convert to fraction form
   570,740,840.32/787,626,390.72 = 309,980,456.32/x
3. Step 3: Cross multiply
   570,740,840.32x = 787,626,390.72 × 309,980,456.32
4. Step 4: Simplify right side
   570,740,840.32x = 244,148,788,005,060,224
5. Step 5: Solve for x
   x = 244,148,788,005,060,224/570,740,840.32
6. Step 6: Final answer
   x = 427,775,219.08