Finding the Fourth Proportional to 28,077,755.89, 42,088,733.16 and 19,540,156.21

Step by Step Solution

1. Step 1: Write the proportion equation
   28,077,755.89 : 42,088,733.16 = 19,540,156.21 : x
2. Step 2: Convert to fraction form
   28,077,755.89/42,088,733.16 = 19,540,156.21/x
3. Step 3: Cross multiply
   28,077,755.89x = 42,088,733.16 × 19,540,156.21
4. Step 4: Simplify right side
   28,077,755.89x = 822,420,420,627,406.88
5. Step 5: Solve for x
   x = 822,420,420,627,406.88/28,077,755.89
6. Step 6: Final answer
   x = 29,290,817.39