Finding the Fourth Proportional to 318,890,815.34, 440,069,321.59 and 172,213,099.34

Step by Step Solution

1. Step 1: Write the proportion equation
   318,890,815.34 : 440,069,321.59 = 172,213,099.34 : x
2. Step 2: Convert to fraction form
   318,890,815.34/440,069,321.59 = 172,213,099.34/x
3. Step 3: Cross multiply
   318,890,815.34x = 440,069,321.59 × 172,213,099.34
4. Step 4: Simplify right side
   318,890,815.34x = 75,785,701,792,834,192
5. Step 5: Solve for x
   x = 75,785,701,792,834,192/318,890,815.34
6. Step 6: Final answer
   x = 237,654,075.15