Finding the Fourth Proportional to 525,271,443.88, 724,852,074.18 and 290,309,953.96

Step by Step Solution

1. Step 1: Write the proportion equation
   525,271,443.88 : 724,852,074.18 = 290,309,953.96 : x
2. Step 2: Convert to fraction form
   525,271,443.88/724,852,074.18 = 290,309,953.96/x
3. Step 3: Cross multiply
   525,271,443.88x = 724,852,074.18 × 290,309,953.96
4. Step 4: Simplify right side
   525,271,443.88x = 210,431,772,283,006,272
5. Step 5: Solve for x
   x = 210,431,772,283,006,272/525,271,443.88
6. Step 6: Final answer
   x = 400,615,290.88