Finding the Fourth Proportional to 81,433,870.16, 112,341,283.24 and 72,150,915.44

Step by Step Solution

1. Step 1: Write the proportion equation
   81,433,870.16 : 112,341,283.24 = 72,150,915.44 : x
2. Step 2: Convert to fraction form
   81,433,870.16/112,341,283.24 = 72,150,915.44/x
3. Step 3: Cross multiply
   81,433,870.16x = 112,341,283.24 × 72,150,915.44
4. Step 4: Simplify right side
   81,433,870.16x = 8,105,526,427,470,329
5. Step 5: Solve for x
   x = 8,105,526,427,470,329/81,433,870.16
6. Step 6: Final answer
   x = 99,535,075.66