Finding the Fourth Proportional to 98,839.72, 136,408.59 and 56,404.63

Step by Step Solution

1. Step 1: Write the proportion equation
   98,839.72 : 136,408.59 = 56,404.63 : x
2. Step 2: Convert to fraction form
   98,839.72/136,408.59 = 56,404.63/x
3. Step 3: Cross multiply
   98,839.72x = 136,408.59 × 56,404.63
4. Step 4: Simplify right side
   98,839.72x = 7,694,075,706.75
5. Step 5: Solve for x
   x = 7,694,075,706.75/98,839.72
6. Step 6: Final answer
   x = 77,843.97