Finding the Fourth Proportional to 72,870.61, 100,389.13 and 69,507.42

Step by Step Solution

1. Step 1: Write the proportion equation
   72,870.61 : 100,389.13 = 69,507.42 : x
2. Step 2: Convert to fraction form
   72,870.61/100,389.13 = 69,507.42/x
3. Step 3: Cross multiply
   72,870.61x = 100,389.13 × 69,507.42
4. Step 4: Simplify right side
   72,870.61x = 6,977,789,422.34
5. Step 5: Solve for x
   x = 6,977,789,422.34/72,870.61
6. Step 6: Final answer
   x = 95,755.88