Finding the Fourth Proportional to 71,068.30, 106,592.74 and 21,156.10

Step by Step Solution

1. Step 1: Write the proportion equation
   71,068.30 : 106,592.74 = 21,156.10 : x
2. Step 2: Convert to fraction form
   71,068.30/106,592.74 = 21,156.10/x
3. Step 3: Cross multiply
   71,068.30x = 106,592.74 × 21,156.10
4. Step 4: Simplify right side
   71,068.30x = 2,255,086,666.71
5. Step 5: Solve for x
   x = 2,255,086,666.71/71,068.30
6. Step 6: Final answer
   x = 31,731.26