Finding the Fourth Proportional to 21,059,068.14, 29,061,706.41 and 12,357,385.76

Step by Step Solution

1. Step 1: Write the proportion equation
   21,059,068.14 : 29,061,706.41 = 12,357,385.76 : x
2. Step 2: Convert to fraction form
   21,059,068.14/29,061,706.41 = 12,357,385.76/x
3. Step 3: Cross multiply
   21,059,068.14x = 29,061,706.41 × 12,357,385.76
4. Step 4: Simplify right side
   21,059,068.14x = 359,126,716,806,926.19
5. Step 5: Solve for x
   x = 359,126,716,806,926.19/21,059,068.14
6. Step 6: Final answer
   x = 17,053,305.23