Finding the Fourth Proportional to 103,123,734.69, 142,685,489.80 and 89,920,443.65

Step by Step Solution

1. Step 1: Write the proportion equation
   103,123,734.69 : 142,685,489.80 = 89,920,443.65 : x
2. Step 2: Convert to fraction form
   103,123,734.69/142,685,489.80 = 89,920,443.65/x
3. Step 3: Cross multiply
   103,123,734.69x = 142,685,489.80 × 89,920,443.65
4. Step 4: Simplify right side
   103,123,734.69x = 12,830,342,544,520,122
5. Step 5: Solve for x
   x = 12,830,342,544,520,122/103,123,734.69
6. Step 6: Final answer
   x = 124,416,969.41