Finding the Fourth Proportional to 28,155,168.89, 42,248,729.60 and 15,201,147.05

Step by Step Solution

1. Step 1: Write the proportion equation
   28,155,168.89 : 42,248,729.60 = 15,201,147.05 : x
2. Step 2: Convert to fraction form
   28,155,168.89/42,248,729.60 = 15,201,147.05/x
3. Step 3: Cross multiply
   28,155,168.89x = 42,248,729.60 × 15,201,147.05
4. Step 4: Simplify right side
   28,155,168.89x = 642,229,151,249,282
5. Step 5: Solve for x
   x = 642,229,151,249,282/28,155,168.89
6. Step 6: Final answer
   x = 22,810,346.26