Finding the Fourth Proportional to 151,390,744.91, 208,919,319.51 and 81,776,156.55

Step by Step Solution

1. Step 1: Write the proportion equation
   151,390,744.91 : 208,919,319.51 = 81,776,156.55 : x
2. Step 2: Convert to fraction form
   151,390,744.91/208,919,319.51 = 81,776,156.55/x
3. Step 3: Cross multiply
   151,390,744.91x = 208,919,319.51 × 81,776,156.55
4. Step 4: Simplify right side
   151,390,744.91x = 17,084,618,978,569,228
5. Step 5: Solve for x
   x = 17,084,618,978,569,228/151,390,744.91
6. Step 6: Final answer
   x = 112,851,145.49