Finding the Fourth Proportional to 12,688,302.42, 17,509,404.29 and 7,181,559.05

Step by Step Solution

1. Step 1: Write the proportion equation
   12,688,302.42 : 17,509,404.29 = 7,181,559.05 : x
2. Step 2: Convert to fraction form
   12,688,302.42/17,509,404.29 = 7,181,559.05/x
3. Step 3: Cross multiply
   12,688,302.42x = 17,509,404.29 × 7,181,559.05
4. Step 4: Simplify right side
   12,688,302.42x = 125,744,820,715,503.50
5. Step 5: Solve for x
   x = 125,744,820,715,503.50/12,688,302.42
6. Step 6: Final answer
   x = 9,910,295.05