Finding the Fourth Proportional to 103,425, 142,726.50 and 56,321

Step by Step Solution

1. Step 1: Write the proportion equation
   103,425 : 142,726.50 = 56,321 : x
2. Step 2: Convert to fraction form
   103,425/142,726.50 = 56,321/x
3. Step 3: Cross multiply
   103,425x = 142,726.50 × 56,321
4. Step 4: Simplify right side
   103,425x = 8,038,499,206.50
5. Step 5: Solve for x
   x = 8,038,499,206.50/103,425
6. Step 6: Final answer
   x = 77,722.98