Finding the Fourth Proportional to 72,160,886, 99,592,804.88 and 56,806,513.04

Step by Step Solution

1. Step 1: Write the proportion equation
   72,160,886 : 99,592,804.88 = 56,806,513.04 : x
2. Step 2: Convert to fraction form
   72,160,886/99,592,804.88 = 56,806,513.04/x
3. Step 3: Cross multiply
   72,160,886x = 99,592,804.88 × 56,806,513.04
4. Step 4: Simplify right side
   72,160,886x = 5,657,519,968,821,863
5. Step 5: Solve for x
   x = 5,657,519,968,821,863/72,160,886
6. Step 6: Final answer
   x = 78,401,475.96