Finding the Fourth Proportional to 1,830.69, 2,526.63 and 1,387.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,830.69 : 2,526.63 = 1,387.86 : x
2. Step 2: Convert to fraction form
   1,830.69/2,526.63 = 1,387.86/x
3. Step 3: Cross multiply
   1,830.69x = 2,526.63 × 1,387.86
4. Step 4: Simplify right side
   1,830.69x = 3,506,608.71
5. Step 5: Solve for x
   x = 3,506,608.71/1,830.69
6. Step 6: Final answer
   x = 1,915.46